diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Anthropic/NewtonsoftJson/_#G.Models.ImageBlockSource.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Anthropic/NewtonsoftJson/_#G.Models.ImageBlockSource.g.verified.cs
index aae889579e..88a69d1e6e 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Anthropic/NewtonsoftJson/_#G.Models.ImageBlockSource.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Anthropic/NewtonsoftJson/_#G.Models.ImageBlockSource.g.verified.cs
@@ -24,8 +24,8 @@ public sealed partial class ImageBlockSource
         /// <summary>
         /// The type of image source.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ImageBlockSourceType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.ImageBlockSourceType Type { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Anthropic/SystemTextJson/_#G.Models.ImageBlockSource.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Anthropic/SystemTextJson/_#G.Models.ImageBlockSource.g.verified.cs
index 664f119d7e..72c1c2ec08 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Anthropic/SystemTextJson/_#G.Models.ImageBlockSource.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Anthropic/SystemTextJson/_#G.Models.ImageBlockSource.g.verified.cs
@@ -29,8 +29,7 @@ public sealed partial class ImageBlockSource
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ImageBlockSourceTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ImageBlockSourceType Type { get; set; } = global::G.ImageBlockSourceType.Base64;
+        public global::G.ImageBlockSourceType Type { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.ContentFile.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.ContentFile.g.verified.cs
index 34d1060c98..2f76cc2e67 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.ContentFile.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.ContentFile.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class ContentFile
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ContentFileType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.ContentFileType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.ContentSubmodule.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.ContentSubmodule.g.verified.cs
index c4a3192f6e..6c93ba2482 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.ContentSubmodule.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.ContentSubmodule.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class ContentSubmodule
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ContentSubmoduleType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.ContentSubmoduleType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.ContentSymlink.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.ContentSymlink.g.verified.cs
index d370d2bb97..8503d4e021 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.ContentSymlink.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.ContentSymlink.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class ContentSymlink
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ContentSymlinkType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.ContentSymlinkType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.OrgsUpdateMembershipForAuthenticatedUserRequest.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.OrgsUpdateMembershipForAuthenticatedUserRequest.g.verified.cs
index 9a1e862eba..a1f6b57727 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.OrgsUpdateMembershipForAuthenticatedUserRequest.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.OrgsUpdateMembershipForAuthenticatedUserRequest.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class OrgsUpdateMembershipForAuthenticatedUserRequest
         /// <summary>
         /// The state that the membership should be in. Only `"active"` will be accepted.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("state", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.OrgsUpdateMembershipForAuthenticatedUserRequestState State { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("state")]
+        public global::G.OrgsUpdateMembershipForAuthenticatedUserRequestState State { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.OrgsUpdatePatAccessRequest.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.OrgsUpdatePatAccessRequest.g.verified.cs
index deb933281e..b2037670e3 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.OrgsUpdatePatAccessRequest.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.OrgsUpdatePatAccessRequest.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class OrgsUpdatePatAccessRequest
         /// <summary>
         /// Action to apply to the fine-grained personal access token.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.OrgsUpdatePatAccessRequestAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.OrgsUpdatePatAccessRequestAction Action { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.OrgsUpdatePatAccessesRequest.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.OrgsUpdatePatAccessesRequest.g.verified.cs
index f040611d46..d5e3d8379e 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.OrgsUpdatePatAccessesRequest.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.OrgsUpdatePatAccessesRequest.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class OrgsUpdatePatAccessesRequest
         /// <summary>
         /// Action to apply to the fine-grained personal access token.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.OrgsUpdatePatAccessesRequestAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.OrgsUpdatePatAccessesRequestAction Action { get; set; }
 
         /// <summary>
         /// The IDs of the fine-grained personal access tokens.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleBranchNamePattern.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleBranchNamePattern.g.verified.cs
index f6ed807f90..e6da32e475 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleBranchNamePattern.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleBranchNamePattern.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class RepositoryRuleBranchNamePattern
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RepositoryRuleBranchNamePatternType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.RepositoryRuleBranchNamePatternType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleCodeScanning.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleCodeScanning.g.verified.cs
index 78a5b6d9bd..e185fefa34 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleCodeScanning.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleCodeScanning.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class RepositoryRuleCodeScanning
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RepositoryRuleCodeScanningType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.RepositoryRuleCodeScanningType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleCommitAuthorEmailPattern.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleCommitAuthorEmailPattern.g.verified.cs
index 571117ba84..87db02ea17 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleCommitAuthorEmailPattern.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleCommitAuthorEmailPattern.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class RepositoryRuleCommitAuthorEmailPattern
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RepositoryRuleCommitAuthorEmailPatternType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.RepositoryRuleCommitAuthorEmailPatternType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleCommitMessagePattern.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleCommitMessagePattern.g.verified.cs
index bd3d5650cc..13830539fd 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleCommitMessagePattern.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleCommitMessagePattern.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class RepositoryRuleCommitMessagePattern
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RepositoryRuleCommitMessagePatternType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.RepositoryRuleCommitMessagePatternType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleCommitterEmailPattern.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleCommitterEmailPattern.g.verified.cs
index 845a971be3..64fa5c6a40 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleCommitterEmailPattern.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleCommitterEmailPattern.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class RepositoryRuleCommitterEmailPattern
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RepositoryRuleCommitterEmailPatternType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.RepositoryRuleCommitterEmailPatternType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleCreation.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleCreation.g.verified.cs
index 405466e091..876c34d231 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleCreation.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleCreation.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class RepositoryRuleCreation
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RepositoryRuleCreationType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.RepositoryRuleCreationType Type { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleDeletion.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleDeletion.g.verified.cs
index 5128c5d954..cedf3e6de7 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleDeletion.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleDeletion.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class RepositoryRuleDeletion
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RepositoryRuleDeletionType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.RepositoryRuleDeletionType Type { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleNonFastForward.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleNonFastForward.g.verified.cs
index 98188acb7e..c5c59483c6 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleNonFastForward.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleNonFastForward.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class RepositoryRuleNonFastForward
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RepositoryRuleNonFastForwardType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.RepositoryRuleNonFastForwardType Type { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRulePullRequest.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRulePullRequest.g.verified.cs
index dfbeed6ed9..7f0cdc96c7 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRulePullRequest.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRulePullRequest.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class RepositoryRulePullRequest
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RepositoryRulePullRequestType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.RepositoryRulePullRequestType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleRequiredDeployments.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleRequiredDeployments.g.verified.cs
index 1f339f68a8..0d68e83e5c 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleRequiredDeployments.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleRequiredDeployments.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class RepositoryRuleRequiredDeployments
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RepositoryRuleRequiredDeploymentsType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.RepositoryRuleRequiredDeploymentsType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleRequiredLinearHistory.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleRequiredLinearHistory.g.verified.cs
index 0b3f14e2a8..610a975227 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleRequiredLinearHistory.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleRequiredLinearHistory.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class RepositoryRuleRequiredLinearHistory
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RepositoryRuleRequiredLinearHistoryType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.RepositoryRuleRequiredLinearHistoryType Type { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleRequiredSignatures.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleRequiredSignatures.g.verified.cs
index 9e0db6bae2..b036efce00 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleRequiredSignatures.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleRequiredSignatures.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class RepositoryRuleRequiredSignatures
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RepositoryRuleRequiredSignaturesType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.RepositoryRuleRequiredSignaturesType Type { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleRequiredStatusChecks.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleRequiredStatusChecks.g.verified.cs
index 9cafbfe5af..5784925bbb 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleRequiredStatusChecks.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleRequiredStatusChecks.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class RepositoryRuleRequiredStatusChecks
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RepositoryRuleRequiredStatusChecksType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.RepositoryRuleRequiredStatusChecksType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleTagNamePattern.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleTagNamePattern.g.verified.cs
index 143b38991e..d712477810 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleTagNamePattern.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleTagNamePattern.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class RepositoryRuleTagNamePattern
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RepositoryRuleTagNamePatternType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.RepositoryRuleTagNamePatternType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleUpdate.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleUpdate.g.verified.cs
index a819f13da0..eb243bca1f 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleUpdate.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleUpdate.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class RepositoryRuleUpdate
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RepositoryRuleUpdateType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.RepositoryRuleUpdateType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleVariant15.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleVariant15.g.verified.cs
index aa5ccb4993..f8791b0e59 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleVariant15.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleVariant15.g.verified.cs
@@ -13,8 +13,8 @@ public sealed partial class RepositoryRuleVariant15
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RepositoryRuleVariant15Type Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.RepositoryRuleVariant15Type Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleVariant16.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleVariant16.g.verified.cs
index 3ab689fd84..0520e67078 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleVariant16.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleVariant16.g.verified.cs
@@ -13,8 +13,8 @@ public sealed partial class RepositoryRuleVariant16
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RepositoryRuleVariant16Type Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.RepositoryRuleVariant16Type Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleVariant17.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleVariant17.g.verified.cs
index 3cf323e21f..8c5ffd5393 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleVariant17.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleVariant17.g.verified.cs
@@ -13,8 +13,8 @@ public sealed partial class RepositoryRuleVariant17
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RepositoryRuleVariant17Type Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.RepositoryRuleVariant17Type Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleVariant18.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleVariant18.g.verified.cs
index 05f2f7d5f6..ba176bbbc7 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleVariant18.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleVariant18.g.verified.cs
@@ -13,8 +13,8 @@ public sealed partial class RepositoryRuleVariant18
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RepositoryRuleVariant18Type Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.RepositoryRuleVariant18Type Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleWorkflows.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleWorkflows.g.verified.cs
index 4188d72eeb..f16207695b 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleWorkflows.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.RepositoryRuleWorkflows.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class RepositoryRuleWorkflows
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RepositoryRuleWorkflowsType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.RepositoryRuleWorkflowsType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookBranchProtectionConfigurationDisabled.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookBranchProtectionConfigurationDisabled.g.verified.cs
index 19b08fdf26..2c0e89d527 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookBranchProtectionConfigurationDisabled.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookBranchProtectionConfigurationDisabled.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookBranchProtectionConfigurationDisabled
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookBranchProtectionConfigurationDisabledAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookBranchProtectionConfigurationDisabledAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookBranchProtectionConfigurationEnabled.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookBranchProtectionConfigurationEnabled.g.verified.cs
index 97fe43e307..f134e90667 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookBranchProtectionConfigurationEnabled.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookBranchProtectionConfigurationEnabled.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookBranchProtectionConfigurationEnabled
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookBranchProtectionConfigurationEnabledAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookBranchProtectionConfigurationEnabledAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookBranchProtectionRuleCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookBranchProtectionRuleCreated.g.verified.cs
index 62cff1061f..26c3df5e67 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookBranchProtectionRuleCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookBranchProtectionRuleCreated.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookBranchProtectionRuleCreated
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookBranchProtectionRuleCreatedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookBranchProtectionRuleCreatedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookBranchProtectionRuleDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookBranchProtectionRuleDeleted.g.verified.cs
index 36a3745c15..a0bb71507c 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookBranchProtectionRuleDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookBranchProtectionRuleDeleted.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookBranchProtectionRuleDeleted
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookBranchProtectionRuleDeletedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookBranchProtectionRuleDeletedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookBranchProtectionRuleEdited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookBranchProtectionRuleEdited.g.verified.cs
index 580890942e..9dcfbbacb7 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookBranchProtectionRuleEdited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookBranchProtectionRuleEdited.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookBranchProtectionRuleEdited
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookBranchProtectionRuleEditedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookBranchProtectionRuleEditedAction Action { get; set; }
 
         /// <summary>
         /// If the action was `edited`, the changes to the rule.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCheckRunRequestedAction.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCheckRunRequestedAction.g.verified.cs
index 864e31b6ee..c07bb0259f 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCheckRunRequestedAction.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCheckRunRequestedAction.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookCheckRunRequestedAction
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookCheckRunRequestedActionAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookCheckRunRequestedActionAction Action { get; set; }
 
         /// <summary>
         /// A check performed on the code of a given code change
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCheckSuiteCompleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCheckSuiteCompleted.g.verified.cs
index 19d915f260..127bff2cd9 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCheckSuiteCompleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCheckSuiteCompleted.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookCheckSuiteCompleted
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookCheckSuiteCompletedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookCheckSuiteCompletedAction Action { get; set; }
 
         /// <summary>
         /// The [check_suite](https://docs.github.com/rest/checks/suites#get-a-check-suite).
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCheckSuiteRequested.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCheckSuiteRequested.g.verified.cs
index d9b837679c..0da0db9dff 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCheckSuiteRequested.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCheckSuiteRequested.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookCheckSuiteRequested
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookCheckSuiteRequestedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookCheckSuiteRequestedAction Action { get; set; }
 
         /// <summary>
         /// The [check_suite](https://docs.github.com/rest/checks/suites#get-a-check-suite).
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCheckSuiteRerequested.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCheckSuiteRerequested.g.verified.cs
index f234ad8eb8..ad9f0f0d0d 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCheckSuiteRerequested.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCheckSuiteRerequested.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookCheckSuiteRerequested
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookCheckSuiteRerequestedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookCheckSuiteRerequestedAction Action { get; set; }
 
         /// <summary>
         /// The [check_suite](https://docs.github.com/rest/checks/suites#get-a-check-suite).
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCodeScanningAlertAppearedInBranch.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCodeScanningAlertAppearedInBranch.g.verified.cs
index 65164fa2f6..6f5c6f47ee 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCodeScanningAlertAppearedInBranch.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCodeScanningAlertAppearedInBranch.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookCodeScanningAlertAppearedInBranch
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookCodeScanningAlertAppearedInBranchAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookCodeScanningAlertAppearedInBranchAction Action { get; set; }
 
         /// <summary>
         /// The code scanning alert involved in the event.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCodeScanningAlertClosedByUser.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCodeScanningAlertClosedByUser.g.verified.cs
index 5efee03859..12625cd3ec 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCodeScanningAlertClosedByUser.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCodeScanningAlertClosedByUser.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookCodeScanningAlertClosedByUser
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookCodeScanningAlertClosedByUserAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookCodeScanningAlertClosedByUserAction Action { get; set; }
 
         /// <summary>
         /// The code scanning alert involved in the event.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCodeScanningAlertCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCodeScanningAlertCreated.g.verified.cs
index f354296c45..6210f7d6e0 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCodeScanningAlertCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCodeScanningAlertCreated.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookCodeScanningAlertCreated
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookCodeScanningAlertCreatedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookCodeScanningAlertCreatedAction Action { get; set; }
 
         /// <summary>
         /// The code scanning alert involved in the event.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCodeScanningAlertFixed.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCodeScanningAlertFixed.g.verified.cs
index 68cdc74d40..f8b11322da 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCodeScanningAlertFixed.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCodeScanningAlertFixed.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookCodeScanningAlertFixed
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookCodeScanningAlertFixedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookCodeScanningAlertFixedAction Action { get; set; }
 
         /// <summary>
         /// The code scanning alert involved in the event.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCodeScanningAlertFixedAlert.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCodeScanningAlertFixedAlert.g.verified.cs
index 66d246a268..fb161b69a8 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCodeScanningAlertFixedAlert.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCodeScanningAlertFixedAlert.g.verified.cs
@@ -66,8 +66,8 @@ public sealed partial class WebhookCodeScanningAlertFixedAlert
         /// <summary>
         /// State of a code scanning alert.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("state", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookCodeScanningAlertFixedAlertState State { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("state")]
+        public global::G.WebhookCodeScanningAlertFixedAlertState State { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCodeScanningAlertReopened.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCodeScanningAlertReopened.g.verified.cs
index ece684fb66..f3c77f544e 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCodeScanningAlertReopened.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCodeScanningAlertReopened.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookCodeScanningAlertReopened
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookCodeScanningAlertReopenedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookCodeScanningAlertReopenedAction Action { get; set; }
 
         /// <summary>
         /// The code scanning alert involved in the event.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCodeScanningAlertReopenedByUser.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCodeScanningAlertReopenedByUser.g.verified.cs
index 56097e35cb..98be15e8ff 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCodeScanningAlertReopenedByUser.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCodeScanningAlertReopenedByUser.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookCodeScanningAlertReopenedByUser
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookCodeScanningAlertReopenedByUserAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookCodeScanningAlertReopenedByUserAction Action { get; set; }
 
         /// <summary>
         /// The code scanning alert involved in the event.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCommitCommentCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCommitCommentCreated.g.verified.cs
index 91a412b7c6..3f273ce4e2 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCommitCommentCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCommitCommentCreated.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookCommitCommentCreated
         /// <summary>
         /// The action performed. Can be `created`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookCommitCommentCreatedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookCommitCommentCreatedAction Action { get; set; }
 
         /// <summary>
         /// The [commit comment](https://docs.github.com/rest/commits/comments#get-a-commit-comment) resource.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCustomPropertyCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCustomPropertyCreated.g.verified.cs
index deedff2336..93c8c3cad1 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCustomPropertyCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCustomPropertyCreated.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookCustomPropertyCreated
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookCustomPropertyCreatedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookCustomPropertyCreatedAction Action { get; set; }
 
         /// <summary>
         /// Custom property defined on an organization
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCustomPropertyDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCustomPropertyDeleted.g.verified.cs
index 1673de70e1..c78b5de87b 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCustomPropertyDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCustomPropertyDeleted.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookCustomPropertyDeleted
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookCustomPropertyDeletedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookCustomPropertyDeletedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCustomPropertyUpdated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCustomPropertyUpdated.g.verified.cs
index b43d4d4cfc..d9e4d1e39a 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCustomPropertyUpdated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCustomPropertyUpdated.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookCustomPropertyUpdated
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookCustomPropertyUpdatedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookCustomPropertyUpdatedAction Action { get; set; }
 
         /// <summary>
         /// Custom property defined on an organization
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCustomPropertyValuesUpdated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCustomPropertyValuesUpdated.g.verified.cs
index b09167ff80..eccf9cba2c 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCustomPropertyValuesUpdated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookCustomPropertyValuesUpdated.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookCustomPropertyValuesUpdated
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookCustomPropertyValuesUpdatedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookCustomPropertyValuesUpdatedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDependabotAlertAutoDismissed.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDependabotAlertAutoDismissed.g.verified.cs
index 4e73243a3a..26b685fe1f 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDependabotAlertAutoDismissed.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDependabotAlertAutoDismissed.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookDependabotAlertAutoDismissed
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookDependabotAlertAutoDismissedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookDependabotAlertAutoDismissedAction Action { get; set; }
 
         /// <summary>
         /// A Dependabot alert.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDependabotAlertAutoReopened.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDependabotAlertAutoReopened.g.verified.cs
index 36a0e3afef..6bc10570cf 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDependabotAlertAutoReopened.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDependabotAlertAutoReopened.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookDependabotAlertAutoReopened
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookDependabotAlertAutoReopenedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookDependabotAlertAutoReopenedAction Action { get; set; }
 
         /// <summary>
         /// A Dependabot alert.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDependabotAlertCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDependabotAlertCreated.g.verified.cs
index b3ee12b023..0d285d0446 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDependabotAlertCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDependabotAlertCreated.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookDependabotAlertCreated
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookDependabotAlertCreatedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookDependabotAlertCreatedAction Action { get; set; }
 
         /// <summary>
         /// A Dependabot alert.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDependabotAlertDismissed.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDependabotAlertDismissed.g.verified.cs
index ef57141e86..b1dc900888 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDependabotAlertDismissed.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDependabotAlertDismissed.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookDependabotAlertDismissed
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookDependabotAlertDismissedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookDependabotAlertDismissedAction Action { get; set; }
 
         /// <summary>
         /// A Dependabot alert.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDependabotAlertFixed.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDependabotAlertFixed.g.verified.cs
index 81afab81f0..bc11b36b70 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDependabotAlertFixed.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDependabotAlertFixed.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookDependabotAlertFixed
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookDependabotAlertFixedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookDependabotAlertFixedAction Action { get; set; }
 
         /// <summary>
         /// A Dependabot alert.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDependabotAlertReintroduced.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDependabotAlertReintroduced.g.verified.cs
index 7a19a76341..516a720c39 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDependabotAlertReintroduced.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDependabotAlertReintroduced.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookDependabotAlertReintroduced
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookDependabotAlertReintroducedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookDependabotAlertReintroducedAction Action { get; set; }
 
         /// <summary>
         /// A Dependabot alert.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDependabotAlertReopened.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDependabotAlertReopened.g.verified.cs
index dc0eb649cf..ef82535a5a 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDependabotAlertReopened.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDependabotAlertReopened.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookDependabotAlertReopened
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookDependabotAlertReopenedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookDependabotAlertReopenedAction Action { get; set; }
 
         /// <summary>
         /// A Dependabot alert.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDeployKeyCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDeployKeyCreated.g.verified.cs
index af91b82517..ee4862d27f 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDeployKeyCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDeployKeyCreated.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookDeployKeyCreated
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookDeployKeyCreatedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookDeployKeyCreatedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDeployKeyDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDeployKeyDeleted.g.verified.cs
index 88620b901f..125f8e1bc3 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDeployKeyDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDeployKeyDeleted.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookDeployKeyDeleted
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookDeployKeyDeletedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookDeployKeyDeletedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDeploymentCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDeploymentCreated.g.verified.cs
index 5a53617826..2b08121ea0 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDeploymentCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDeploymentCreated.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookDeploymentCreated
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookDeploymentCreatedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookDeploymentCreatedAction Action { get; set; }
 
         /// <summary>
         /// The [deployment](https://docs.github.com/rest/deployments/deployments#list-deployments).
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDeploymentReviewApproved.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDeploymentReviewApproved.g.verified.cs
index 5c07564f09..57f1a7e82d 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDeploymentReviewApproved.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDeploymentReviewApproved.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookDeploymentReviewApproved
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookDeploymentReviewApprovedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookDeploymentReviewApprovedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDeploymentReviewRejected.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDeploymentReviewRejected.g.verified.cs
index b831656a65..b5a2c75e0e 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDeploymentReviewRejected.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDeploymentReviewRejected.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookDeploymentReviewRejected
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookDeploymentReviewRejectedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookDeploymentReviewRejectedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDeploymentReviewRequested.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDeploymentReviewRequested.g.verified.cs
index e26175e32a..e93661d808 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDeploymentReviewRequested.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDeploymentReviewRequested.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookDeploymentReviewRequested
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookDeploymentReviewRequestedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookDeploymentReviewRequestedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDeploymentStatusCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDeploymentStatusCreated.g.verified.cs
index 96a4f85076..7f255b468e 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDeploymentStatusCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDeploymentStatusCreated.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookDeploymentStatusCreated
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookDeploymentStatusCreatedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookDeploymentStatusCreatedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionAnswered.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionAnswered.g.verified.cs
index 4da896a4a7..c2ac39ce23 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionAnswered.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionAnswered.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookDiscussionAnswered
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookDiscussionAnsweredAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookDiscussionAnsweredAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionCategoryChanged.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionCategoryChanged.g.verified.cs
index 601ca38929..cdaac1581b 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionCategoryChanged.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionCategoryChanged.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookDiscussionCategoryChanged
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookDiscussionCategoryChangedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookDiscussionCategoryChangedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionClosed.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionClosed.g.verified.cs
index 8fedcf351f..f60b363428 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionClosed.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionClosed.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookDiscussionClosed
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookDiscussionClosedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookDiscussionClosedAction Action { get; set; }
 
         /// <summary>
         /// A Discussion in a repository.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionCommentCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionCommentCreated.g.verified.cs
index 5a7ae90df7..5a2325370c 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionCommentCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionCommentCreated.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookDiscussionCommentCreated
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookDiscussionCommentCreatedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookDiscussionCommentCreatedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionCommentDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionCommentDeleted.g.verified.cs
index 00c94956cc..c614874470 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionCommentDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionCommentDeleted.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookDiscussionCommentDeleted
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookDiscussionCommentDeletedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookDiscussionCommentDeletedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionCommentEdited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionCommentEdited.g.verified.cs
index 63d258c9af..78778672b0 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionCommentEdited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionCommentEdited.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookDiscussionCommentEdited
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookDiscussionCommentEditedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookDiscussionCommentEditedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionCreated.g.verified.cs
index 2726bf24c5..f34f23d390 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionCreated.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookDiscussionCreated
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookDiscussionCreatedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookDiscussionCreatedAction Action { get; set; }
 
         /// <summary>
         /// A Discussion in a repository.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionDeleted.g.verified.cs
index 893199ce5a..526ceb647a 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionDeleted.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookDiscussionDeleted
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookDiscussionDeletedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookDiscussionDeletedAction Action { get; set; }
 
         /// <summary>
         /// A Discussion in a repository.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionEdited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionEdited.g.verified.cs
index 61d3f9307a..2a1dec90bb 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionEdited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionEdited.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookDiscussionEdited
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookDiscussionEditedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookDiscussionEditedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionLabeled.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionLabeled.g.verified.cs
index af78f17d8e..7cff03546c 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionLabeled.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionLabeled.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookDiscussionLabeled
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookDiscussionLabeledAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookDiscussionLabeledAction Action { get; set; }
 
         /// <summary>
         /// A Discussion in a repository.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionLocked.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionLocked.g.verified.cs
index b9a2616b74..00da75a98f 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionLocked.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionLocked.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookDiscussionLocked
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookDiscussionLockedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookDiscussionLockedAction Action { get; set; }
 
         /// <summary>
         /// A Discussion in a repository.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionPinned.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionPinned.g.verified.cs
index c4e0a3084f..5928adc07a 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionPinned.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionPinned.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookDiscussionPinned
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookDiscussionPinnedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookDiscussionPinnedAction Action { get; set; }
 
         /// <summary>
         /// A Discussion in a repository.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionReopened.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionReopened.g.verified.cs
index e634e756c4..e63a056634 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionReopened.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionReopened.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookDiscussionReopened
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookDiscussionReopenedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookDiscussionReopenedAction Action { get; set; }
 
         /// <summary>
         /// A Discussion in a repository.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionTransferred.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionTransferred.g.verified.cs
index bae3d3ba32..23d6dfeec1 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionTransferred.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionTransferred.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookDiscussionTransferred
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookDiscussionTransferredAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookDiscussionTransferredAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionUnanswered.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionUnanswered.g.verified.cs
index ba42ddec29..282a21fc47 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionUnanswered.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionUnanswered.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookDiscussionUnanswered
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookDiscussionUnansweredAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookDiscussionUnansweredAction Action { get; set; }
 
         /// <summary>
         /// A Discussion in a repository.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionUnlabeled.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionUnlabeled.g.verified.cs
index cca088beea..b427724cdd 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionUnlabeled.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionUnlabeled.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookDiscussionUnlabeled
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookDiscussionUnlabeledAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookDiscussionUnlabeledAction Action { get; set; }
 
         /// <summary>
         /// A Discussion in a repository.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionUnlocked.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionUnlocked.g.verified.cs
index 0d928f870b..45dceafb7c 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionUnlocked.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionUnlocked.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookDiscussionUnlocked
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookDiscussionUnlockedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookDiscussionUnlockedAction Action { get; set; }
 
         /// <summary>
         /// A Discussion in a repository.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionUnpinned.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionUnpinned.g.verified.cs
index d5ed59be18..9521f8850f 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionUnpinned.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookDiscussionUnpinned.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookDiscussionUnpinned
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookDiscussionUnpinnedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookDiscussionUnpinnedAction Action { get; set; }
 
         /// <summary>
         /// A Discussion in a repository.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookGithubAppAuthorizationRevoked.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookGithubAppAuthorizationRevoked.g.verified.cs
index aaa6cf7424..b938869b66 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookGithubAppAuthorizationRevoked.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookGithubAppAuthorizationRevoked.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookGithubAppAuthorizationRevoked
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookGithubAppAuthorizationRevokedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookGithubAppAuthorizationRevokedAction Action { get; set; }
 
         /// <summary>
         /// The GitHub user that triggered the event. This property is included in every webhook payload.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookInstallationCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookInstallationCreated.g.verified.cs
index e7a7383ecf..c7d938b824 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookInstallationCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookInstallationCreated.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookInstallationCreated
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookInstallationCreatedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookInstallationCreatedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookInstallationDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookInstallationDeleted.g.verified.cs
index 73d7f18bc6..adab143dad 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookInstallationDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookInstallationDeleted.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookInstallationDeleted
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookInstallationDeletedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookInstallationDeletedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookInstallationNewPermissionsAccepted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookInstallationNewPermissionsAccepted.g.verified.cs
index c8f9d289f7..94f4b14291 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookInstallationNewPermissionsAccepted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookInstallationNewPermissionsAccepted.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookInstallationNewPermissionsAccepted
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookInstallationNewPermissionsAcceptedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookInstallationNewPermissionsAcceptedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookInstallationRepositoriesAdded.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookInstallationRepositoriesAdded.g.verified.cs
index b554edafd6..25040dfaea 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookInstallationRepositoriesAdded.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookInstallationRepositoriesAdded.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookInstallationRepositoriesAdded
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookInstallationRepositoriesAddedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookInstallationRepositoriesAddedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookInstallationRepositoriesRemoved.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookInstallationRepositoriesRemoved.g.verified.cs
index cc2652aa8f..cb288769f2 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookInstallationRepositoriesRemoved.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookInstallationRepositoriesRemoved.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookInstallationRepositoriesRemoved
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookInstallationRepositoriesRemovedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookInstallationRepositoriesRemovedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookInstallationSuspend.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookInstallationSuspend.g.verified.cs
index 95431be2fc..1d269a2e51 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookInstallationSuspend.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookInstallationSuspend.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookInstallationSuspend
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookInstallationSuspendAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookInstallationSuspendAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookInstallationTargetRenamed.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookInstallationTargetRenamed.g.verified.cs
index 140b473528..9f75e6996e 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookInstallationTargetRenamed.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookInstallationTargetRenamed.g.verified.cs
@@ -18,8 +18,8 @@ public sealed partial class WebhookInstallationTargetRenamed
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookInstallationTargetRenamedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookInstallationTargetRenamedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookInstallationUnsuspend.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookInstallationUnsuspend.g.verified.cs
index 14625ce524..659c557ddd 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookInstallationUnsuspend.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookInstallationUnsuspend.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookInstallationUnsuspend
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookInstallationUnsuspendAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookInstallationUnsuspendAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssueCommentCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssueCommentCreated.g.verified.cs
index 0e78ebbd7b..827b6fe837 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssueCommentCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssueCommentCreated.g.verified.cs
@@ -14,8 +14,8 @@ public sealed partial class WebhookIssueCommentCreated
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookIssueCommentCreatedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookIssueCommentCreatedAction Action { get; set; }
 
         /// <summary>
         /// The [comment](https://docs.github.com/rest/issues/comments#get-an-issue-comment) itself.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssueCommentDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssueCommentDeleted.g.verified.cs
index 2d2acb68cc..098f69043c 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssueCommentDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssueCommentDeleted.g.verified.cs
@@ -14,8 +14,8 @@ public sealed partial class WebhookIssueCommentDeleted
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookIssueCommentDeletedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookIssueCommentDeletedAction Action { get; set; }
 
         /// <summary>
         /// The [comment](https://docs.github.com/rest/issues/comments#get-an-issue-comment) itself.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssueCommentEdited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssueCommentEdited.g.verified.cs
index 23c828a38a..443b543ab2 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssueCommentEdited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssueCommentEdited.g.verified.cs
@@ -14,8 +14,8 @@ public sealed partial class WebhookIssueCommentEdited
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookIssueCommentEditedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookIssueCommentEditedAction Action { get; set; }
 
         /// <summary>
         /// The changes to the comment.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesAssigned.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesAssigned.g.verified.cs
index c3aca9bb88..857f18f4c2 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesAssigned.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesAssigned.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookIssuesAssigned
         /// <summary>
         /// The action that was performed.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookIssuesAssignedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookIssuesAssignedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesClosed.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesClosed.g.verified.cs
index ff8553c0b8..ba259a1e92 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesClosed.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesClosed.g.verified.cs
@@ -14,8 +14,8 @@ public sealed partial class WebhookIssuesClosed
         /// <summary>
         /// The action that was performed.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookIssuesClosedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookIssuesClosedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesDeleted.g.verified.cs
index 2a91735d83..c7a0db8b97 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesDeleted.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookIssuesDeleted
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookIssuesDeletedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookIssuesDeletedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesDemilestoned.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesDemilestoned.g.verified.cs
index 1eda7be5dd..276610fc2a 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesDemilestoned.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesDemilestoned.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookIssuesDemilestoned
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookIssuesDemilestonedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookIssuesDemilestonedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesEdited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesEdited.g.verified.cs
index c887edf570..914a8675bd 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesEdited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesEdited.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookIssuesEdited
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookIssuesEditedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookIssuesEditedAction Action { get; set; }
 
         /// <summary>
         /// The changes to the issue.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesLabeled.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesLabeled.g.verified.cs
index 26bbe10afd..78cb1e7bdc 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesLabeled.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesLabeled.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookIssuesLabeled
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookIssuesLabeledAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookIssuesLabeledAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesLocked.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesLocked.g.verified.cs
index e90d60940b..1e77287557 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesLocked.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesLocked.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookIssuesLocked
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookIssuesLockedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookIssuesLockedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesMilestoned.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesMilestoned.g.verified.cs
index 6e57ccbc78..c10163ab16 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesMilestoned.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesMilestoned.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookIssuesMilestoned
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookIssuesMilestonedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookIssuesMilestonedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesOpened.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesOpened.g.verified.cs
index 13efe2c4aa..a6e07ed3ce 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesOpened.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesOpened.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookIssuesOpened
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookIssuesOpenedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookIssuesOpenedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesPinned.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesPinned.g.verified.cs
index 1ec8cf2a07..311f3a6684 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesPinned.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesPinned.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookIssuesPinned
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookIssuesPinnedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookIssuesPinnedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesReopened.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesReopened.g.verified.cs
index fffd27f5ae..e5f37ed2ab 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesReopened.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesReopened.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookIssuesReopened
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookIssuesReopenedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookIssuesReopenedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesTransferred.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesTransferred.g.verified.cs
index b6a52904b9..0f0cfc6309 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesTransferred.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesTransferred.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookIssuesTransferred
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookIssuesTransferredAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookIssuesTransferredAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesUnassigned.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesUnassigned.g.verified.cs
index 95dbac8b19..bb391deecd 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesUnassigned.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesUnassigned.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookIssuesUnassigned
         /// <summary>
         /// The action that was performed.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookIssuesUnassignedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookIssuesUnassignedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesUnlabeled.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesUnlabeled.g.verified.cs
index a4c281f35b..d13044cb62 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesUnlabeled.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesUnlabeled.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookIssuesUnlabeled
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookIssuesUnlabeledAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookIssuesUnlabeledAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesUnlocked.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesUnlocked.g.verified.cs
index 457948efb1..dc381d18ee 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesUnlocked.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesUnlocked.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookIssuesUnlocked
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookIssuesUnlockedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookIssuesUnlockedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesUnpinned.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesUnpinned.g.verified.cs
index e66c4d14e2..3e2e57a586 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesUnpinned.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookIssuesUnpinned.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookIssuesUnpinned
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookIssuesUnpinnedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookIssuesUnpinnedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookLabelCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookLabelCreated.g.verified.cs
index f50ce30b92..41b9b64b87 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookLabelCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookLabelCreated.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookLabelCreated
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookLabelCreatedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookLabelCreatedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookLabelDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookLabelDeleted.g.verified.cs
index 6f65387114..142e793653 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookLabelDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookLabelDeleted.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookLabelDeleted
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookLabelDeletedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookLabelDeletedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookLabelEdited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookLabelEdited.g.verified.cs
index 2d35fba1e3..4e1f7e95e3 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookLabelEdited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookLabelEdited.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookLabelEdited
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookLabelEditedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookLabelEditedAction Action { get; set; }
 
         /// <summary>
         /// The changes to the label if the action was `edited`.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMarketplacePurchaseCancelled.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMarketplacePurchaseCancelled.g.verified.cs
index f11fe2b648..09586992c3 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMarketplacePurchaseCancelled.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMarketplacePurchaseCancelled.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookMarketplacePurchaseCancelled
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookMarketplacePurchaseCancelledAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookMarketplacePurchaseCancelledAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMarketplacePurchaseChanged.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMarketplacePurchaseChanged.g.verified.cs
index 847e3cecfb..48cc3d496a 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMarketplacePurchaseChanged.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMarketplacePurchaseChanged.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookMarketplacePurchaseChanged
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookMarketplacePurchaseChangedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookMarketplacePurchaseChangedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMarketplacePurchasePendingChange.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMarketplacePurchasePendingChange.g.verified.cs
index 376c1023a3..0f420ac67b 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMarketplacePurchasePendingChange.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMarketplacePurchasePendingChange.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookMarketplacePurchasePendingChange
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookMarketplacePurchasePendingChangeAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookMarketplacePurchasePendingChangeAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMarketplacePurchasePendingChangeCancelled.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMarketplacePurchasePendingChangeCancelled.g.verified.cs
index 108ebdb679..2a43e5d313 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMarketplacePurchasePendingChangeCancelled.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMarketplacePurchasePendingChangeCancelled.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookMarketplacePurchasePendingChangeCancelled
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookMarketplacePurchasePendingChangeCancelledAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookMarketplacePurchasePendingChangeCancelledAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMarketplacePurchasePurchased.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMarketplacePurchasePurchased.g.verified.cs
index c6c9610b6b..9a2f7eb35a 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMarketplacePurchasePurchased.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMarketplacePurchasePurchased.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookMarketplacePurchasePurchased
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookMarketplacePurchasePurchasedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookMarketplacePurchasePurchasedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMemberAdded.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMemberAdded.g.verified.cs
index 99f139fd95..43fe99cb37 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMemberAdded.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMemberAdded.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookMemberAdded
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookMemberAddedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookMemberAddedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMemberEdited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMemberEdited.g.verified.cs
index 7cdc9d7298..d3570d2d37 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMemberEdited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMemberEdited.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookMemberEdited
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookMemberEditedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookMemberEditedAction Action { get; set; }
 
         /// <summary>
         /// The changes to the collaborator permissions
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMemberRemoved.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMemberRemoved.g.verified.cs
index 2c582d32dd..a48353b3c8 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMemberRemoved.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMemberRemoved.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookMemberRemoved
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookMemberRemovedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookMemberRemovedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMembershipAdded.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMembershipAdded.g.verified.cs
index 963e1ba20d..c7a3f2eaca 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMembershipAdded.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMembershipAdded.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookMembershipAdded
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookMembershipAddedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookMembershipAddedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
@@ -54,8 +54,8 @@ public sealed partial class WebhookMembershipAdded
         /// <summary>
         /// The scope of the membership. Currently, can only be `team`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("scope", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookMembershipAddedScope Scope { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("scope")]
+        public global::G.WebhookMembershipAddedScope Scope { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMembershipRemoved.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMembershipRemoved.g.verified.cs
index 6cd4397c15..ad8a9e4fe1 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMembershipRemoved.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMembershipRemoved.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookMembershipRemoved
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookMembershipRemovedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookMembershipRemovedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMergeGroupChecksRequested.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMergeGroupChecksRequested.g.verified.cs
index 9cb95911c7..30e5e43aa1 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMergeGroupChecksRequested.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMergeGroupChecksRequested.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookMergeGroupChecksRequested
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookMergeGroupChecksRequestedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookMergeGroupChecksRequestedAction Action { get; set; }
 
         /// <summary>
         /// The GitHub App installation. Webhook payloads contain the `installation` property when the event is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMergeGroupDestroyed.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMergeGroupDestroyed.g.verified.cs
index acd77ac01c..4085543772 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMergeGroupDestroyed.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMergeGroupDestroyed.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookMergeGroupDestroyed
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookMergeGroupDestroyedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookMergeGroupDestroyedAction Action { get; set; }
 
         /// <summary>
         /// Explains why the merge group is being destroyed. The group could have been merged, removed from the queue (dequeued), or invalidated by an earlier queue entry being dequeued (invalidated).
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMetaDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMetaDeleted.g.verified.cs
index 93f6dc87e7..6f7061673a 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMetaDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMetaDeleted.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookMetaDeleted
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookMetaDeletedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookMetaDeletedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMilestoneClosed.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMilestoneClosed.g.verified.cs
index 97f69a9079..54fc86728b 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMilestoneClosed.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMilestoneClosed.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookMilestoneClosed
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookMilestoneClosedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookMilestoneClosedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMilestoneCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMilestoneCreated.g.verified.cs
index f59100e42b..eaccbeda87 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMilestoneCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMilestoneCreated.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookMilestoneCreated
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookMilestoneCreatedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookMilestoneCreatedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMilestoneDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMilestoneDeleted.g.verified.cs
index ad21b28f4a..67d0217a73 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMilestoneDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMilestoneDeleted.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookMilestoneDeleted
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookMilestoneDeletedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookMilestoneDeletedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMilestoneEdited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMilestoneEdited.g.verified.cs
index 5315493717..5ec7d0f12e 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMilestoneEdited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMilestoneEdited.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookMilestoneEdited
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookMilestoneEditedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookMilestoneEditedAction Action { get; set; }
 
         /// <summary>
         /// The changes to the milestone if the action was `edited`.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMilestoneOpened.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMilestoneOpened.g.verified.cs
index 86127a0d28..db3414a9ac 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMilestoneOpened.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookMilestoneOpened.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookMilestoneOpened
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookMilestoneOpenedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookMilestoneOpenedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookOrgBlockBlocked.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookOrgBlockBlocked.g.verified.cs
index 4246acc280..dba8f3e3b4 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookOrgBlockBlocked.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookOrgBlockBlocked.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookOrgBlockBlocked
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookOrgBlockBlockedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookOrgBlockBlockedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookOrgBlockUnblocked.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookOrgBlockUnblocked.g.verified.cs
index 3b04f802e0..e1040372b4 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookOrgBlockUnblocked.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookOrgBlockUnblocked.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookOrgBlockUnblocked
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookOrgBlockUnblockedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookOrgBlockUnblockedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookOrganizationDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookOrganizationDeleted.g.verified.cs
index 3be74f1713..e5a88eb4d4 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookOrganizationDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookOrganizationDeleted.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookOrganizationDeleted
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookOrganizationDeletedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookOrganizationDeletedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookOrganizationMemberAdded.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookOrganizationMemberAdded.g.verified.cs
index 0c12a9c60a..d4fc592736 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookOrganizationMemberAdded.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookOrganizationMemberAdded.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookOrganizationMemberAdded
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookOrganizationMemberAddedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookOrganizationMemberAddedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookOrganizationMemberInvited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookOrganizationMemberInvited.g.verified.cs
index 8c4b253625..20ab7ec644 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookOrganizationMemberInvited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookOrganizationMemberInvited.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookOrganizationMemberInvited
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookOrganizationMemberInvitedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookOrganizationMemberInvitedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookOrganizationMemberRemoved.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookOrganizationMemberRemoved.g.verified.cs
index e95fdae57c..de34d3bd13 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookOrganizationMemberRemoved.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookOrganizationMemberRemoved.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookOrganizationMemberRemoved
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookOrganizationMemberRemovedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookOrganizationMemberRemovedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookOrganizationRenamed.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookOrganizationRenamed.g.verified.cs
index 53a1c7add4..524e3506d2 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookOrganizationRenamed.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookOrganizationRenamed.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookOrganizationRenamed
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookOrganizationRenamedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookOrganizationRenamedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPackagePublished.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPackagePublished.g.verified.cs
index 2c68caacf4..f0c92f3043 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPackagePublished.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPackagePublished.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookPackagePublished
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookPackagePublishedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookPackagePublishedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPackageUpdated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPackageUpdated.g.verified.cs
index 5b98fa6029..c69e6f855b 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPackageUpdated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPackageUpdated.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookPackageUpdated
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookPackageUpdatedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookPackageUpdatedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPersonalAccessTokenRequestApproved.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPersonalAccessTokenRequestApproved.g.verified.cs
index 515e50aee7..573fef61ed 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPersonalAccessTokenRequestApproved.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPersonalAccessTokenRequestApproved.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookPersonalAccessTokenRequestApproved
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookPersonalAccessTokenRequestApprovedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookPersonalAccessTokenRequestApprovedAction Action { get; set; }
 
         /// <summary>
         /// Details of a Personal Access Token Request.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPersonalAccessTokenRequestCancelled.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPersonalAccessTokenRequestCancelled.g.verified.cs
index 4149eb4287..774968f604 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPersonalAccessTokenRequestCancelled.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPersonalAccessTokenRequestCancelled.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookPersonalAccessTokenRequestCancelled
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookPersonalAccessTokenRequestCancelledAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookPersonalAccessTokenRequestCancelledAction Action { get; set; }
 
         /// <summary>
         /// Details of a Personal Access Token Request.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPersonalAccessTokenRequestCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPersonalAccessTokenRequestCreated.g.verified.cs
index 1c03954a48..ff044fe0a3 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPersonalAccessTokenRequestCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPersonalAccessTokenRequestCreated.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookPersonalAccessTokenRequestCreated
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookPersonalAccessTokenRequestCreatedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookPersonalAccessTokenRequestCreatedAction Action { get; set; }
 
         /// <summary>
         /// Details of a Personal Access Token Request.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPersonalAccessTokenRequestDenied.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPersonalAccessTokenRequestDenied.g.verified.cs
index 5b02ce8fff..f62bcae39a 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPersonalAccessTokenRequestDenied.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPersonalAccessTokenRequestDenied.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookPersonalAccessTokenRequestDenied
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookPersonalAccessTokenRequestDeniedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookPersonalAccessTokenRequestDeniedAction Action { get; set; }
 
         /// <summary>
         /// Details of a Personal Access Token Request.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPingHook.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPingHook.g.verified.cs
index 13e65246e7..fa43e08136 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPingHook.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPingHook.g.verified.cs
@@ -60,8 +60,8 @@ public sealed partial class WebhookPingHook
         /// <summary>
         /// The type of webhook. The only valid value is 'web'.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("name", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookPingHookName Name { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("name")]
+        public global::G.WebhookPingHookName Name { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectCardConverted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectCardConverted.g.verified.cs
index 4afa5cd7e0..89da726828 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectCardConverted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectCardConverted.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookProjectCardConverted
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookProjectCardConvertedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookProjectCardConvertedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectCardCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectCardCreated.g.verified.cs
index 221eaa4308..c9bc24973e 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectCardCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectCardCreated.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookProjectCardCreated
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookProjectCardCreatedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookProjectCardCreatedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectCardDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectCardDeleted.g.verified.cs
index 7e8582c0ce..0692f912f5 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectCardDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectCardDeleted.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookProjectCardDeleted
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookProjectCardDeletedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookProjectCardDeletedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectCardEdited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectCardEdited.g.verified.cs
index fd11960ef2..aada79dc16 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectCardEdited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectCardEdited.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookProjectCardEdited
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookProjectCardEditedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookProjectCardEditedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectCardMoved.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectCardMoved.g.verified.cs
index c084e14da6..599e4a1cc5 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectCardMoved.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectCardMoved.g.verified.cs
@@ -14,8 +14,8 @@ public sealed partial class WebhookProjectCardMoved
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookProjectCardMovedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookProjectCardMovedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectClosed.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectClosed.g.verified.cs
index c88728b47b..71e7eaa8d8 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectClosed.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectClosed.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookProjectClosed
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookProjectClosedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookProjectClosedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectColumnCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectColumnCreated.g.verified.cs
index 3d66239c71..4bf2c66e07 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectColumnCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectColumnCreated.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookProjectColumnCreated
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookProjectColumnCreatedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookProjectColumnCreatedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectColumnDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectColumnDeleted.g.verified.cs
index 2757168d90..40caebc9d9 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectColumnDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectColumnDeleted.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookProjectColumnDeleted
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookProjectColumnDeletedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookProjectColumnDeletedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectColumnEdited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectColumnEdited.g.verified.cs
index ae0629d220..b29eeb9bec 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectColumnEdited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectColumnEdited.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookProjectColumnEdited
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookProjectColumnEditedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookProjectColumnEditedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectColumnMoved.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectColumnMoved.g.verified.cs
index 43b05c7df2..bf2ad5abec 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectColumnMoved.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectColumnMoved.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookProjectColumnMoved
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookProjectColumnMovedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookProjectColumnMovedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectCreated.g.verified.cs
index e184acaaaa..63880334bc 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectCreated.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookProjectCreated
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookProjectCreatedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookProjectCreatedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectDeleted.g.verified.cs
index 2ac9bd9a39..0d3e0ea2d1 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectDeleted.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookProjectDeleted
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookProjectDeletedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookProjectDeletedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectEdited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectEdited.g.verified.cs
index c6a1b8ed38..d99644d970 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectEdited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectEdited.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookProjectEdited
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookProjectEditedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookProjectEditedAction Action { get; set; }
 
         /// <summary>
         /// The changes to the project if the action was `edited`.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectReopened.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectReopened.g.verified.cs
index eb12bb6577..af1ed8fc19 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectReopened.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectReopened.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookProjectReopened
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookProjectReopenedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookProjectReopenedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ItemArchived.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ItemArchived.g.verified.cs
index 4394acf57f..7933750366 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ItemArchived.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ItemArchived.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookProjectsV2ItemArchived
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookProjectsV2ItemArchivedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookProjectsV2ItemArchivedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ItemConverted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ItemConverted.g.verified.cs
index 75faa59ac6..3aa95f61b1 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ItemConverted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ItemConverted.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookProjectsV2ItemConverted
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookProjectsV2ItemConvertedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookProjectsV2ItemConvertedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ItemCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ItemCreated.g.verified.cs
index 8629091b15..d763440535 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ItemCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ItemCreated.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookProjectsV2ItemCreated
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookProjectsV2ItemCreatedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookProjectsV2ItemCreatedAction Action { get; set; }
 
         /// <summary>
         /// The GitHub App installation. Webhook payloads contain the `installation` property when the event is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ItemDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ItemDeleted.g.verified.cs
index d08cb1894a..773d18edef 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ItemDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ItemDeleted.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookProjectsV2ItemDeleted
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookProjectsV2ItemDeletedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookProjectsV2ItemDeletedAction Action { get; set; }
 
         /// <summary>
         /// The GitHub App installation. Webhook payloads contain the `installation` property when the event is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ItemEdited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ItemEdited.g.verified.cs
index ede297a700..592576b465 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ItemEdited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ItemEdited.g.verified.cs
@@ -14,8 +14,8 @@ public sealed partial class WebhookProjectsV2ItemEdited
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookProjectsV2ItemEditedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookProjectsV2ItemEditedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ItemReordered.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ItemReordered.g.verified.cs
index df19de91e9..8859d35917 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ItemReordered.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ItemReordered.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookProjectsV2ItemReordered
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookProjectsV2ItemReorderedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookProjectsV2ItemReorderedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ItemRestored.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ItemRestored.g.verified.cs
index 74a7dbc38c..b76e4fac14 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ItemRestored.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ItemRestored.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookProjectsV2ItemRestored
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookProjectsV2ItemRestoredAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookProjectsV2ItemRestoredAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ProjectClosed.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ProjectClosed.g.verified.cs
index ceea142906..bcee2c915a 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ProjectClosed.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ProjectClosed.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookProjectsV2ProjectClosed
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookProjectsV2ProjectClosedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookProjectsV2ProjectClosedAction Action { get; set; }
 
         /// <summary>
         /// The GitHub App installation. Webhook payloads contain the `installation` property when the event is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ProjectCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ProjectCreated.g.verified.cs
index 3c08e5e32a..2c9ecd6be5 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ProjectCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ProjectCreated.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookProjectsV2ProjectCreated
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookProjectsV2ProjectCreatedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookProjectsV2ProjectCreatedAction Action { get; set; }
 
         /// <summary>
         /// The GitHub App installation. Webhook payloads contain the `installation` property when the event is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ProjectDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ProjectDeleted.g.verified.cs
index 037d0693b7..1d1dce572b 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ProjectDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ProjectDeleted.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookProjectsV2ProjectDeleted
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookProjectsV2ProjectDeletedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookProjectsV2ProjectDeletedAction Action { get; set; }
 
         /// <summary>
         /// The GitHub App installation. Webhook payloads contain the `installation` property when the event is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ProjectEdited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ProjectEdited.g.verified.cs
index 467aa7a3bb..2ef1c27a2f 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ProjectEdited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ProjectEdited.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookProjectsV2ProjectEdited
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookProjectsV2ProjectEditedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookProjectsV2ProjectEditedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ProjectReopened.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ProjectReopened.g.verified.cs
index 14c10c83f8..526d54d832 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ProjectReopened.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookProjectsV2ProjectReopened.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookProjectsV2ProjectReopened
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookProjectsV2ProjectReopenedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookProjectsV2ProjectReopenedAction Action { get; set; }
 
         /// <summary>
         /// The GitHub App installation. Webhook payloads contain the `installation` property when the event is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestAssigned.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestAssigned.g.verified.cs
index f3096eabb0..c5519d1c2d 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestAssigned.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestAssigned.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookPullRequestAssigned
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookPullRequestAssignedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookPullRequestAssignedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestAutoMergeDisabled.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestAutoMergeDisabled.g.verified.cs
index 62d9aef795..a28b9e65cf 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestAutoMergeDisabled.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestAutoMergeDisabled.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookPullRequestAutoMergeDisabled
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookPullRequestAutoMergeDisabledAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookPullRequestAutoMergeDisabledAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestAutoMergeEnabled.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestAutoMergeEnabled.g.verified.cs
index 2e62e1bc03..1679391a91 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestAutoMergeEnabled.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestAutoMergeEnabled.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookPullRequestAutoMergeEnabled
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookPullRequestAutoMergeEnabledAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookPullRequestAutoMergeEnabledAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestClosed.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestClosed.g.verified.cs
index b1b3a1dd78..3cd7a52d5a 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestClosed.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestClosed.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookPullRequestClosed
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookPullRequestClosedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookPullRequestClosedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestConvertedToDraft.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestConvertedToDraft.g.verified.cs
index 6518f61d09..daff5d5df4 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestConvertedToDraft.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestConvertedToDraft.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookPullRequestConvertedToDraft
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookPullRequestConvertedToDraftAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookPullRequestConvertedToDraftAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestDemilestoned.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestDemilestoned.g.verified.cs
index 8d40c8352c..527e0fe996 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestDemilestoned.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestDemilestoned.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookPullRequestDemilestoned
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookPullRequestDemilestonedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookPullRequestDemilestonedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestDequeued.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestDequeued.g.verified.cs
index 3eef9782ab..39249a9d10 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestDequeued.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestDequeued.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookPullRequestDequeued
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookPullRequestDequeuedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookPullRequestDequeuedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestEdited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestEdited.g.verified.cs
index dabedfc530..ba6bd65c66 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestEdited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestEdited.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookPullRequestEdited
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookPullRequestEditedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookPullRequestEditedAction Action { get; set; }
 
         /// <summary>
         /// The changes to the comment if the action was `edited`.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestEnqueued.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestEnqueued.g.verified.cs
index d94d7e3bcb..7fd39ac707 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestEnqueued.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestEnqueued.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookPullRequestEnqueued
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookPullRequestEnqueuedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookPullRequestEnqueuedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestLabeled.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestLabeled.g.verified.cs
index 4e266d9381..95c85d9854 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestLabeled.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestLabeled.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookPullRequestLabeled
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookPullRequestLabeledAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookPullRequestLabeledAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestLocked.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestLocked.g.verified.cs
index eb47ea97ed..d35f2f86d1 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestLocked.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestLocked.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookPullRequestLocked
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookPullRequestLockedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookPullRequestLockedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestMilestoned.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestMilestoned.g.verified.cs
index 822ab2fbc6..2b9bc10331 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestMilestoned.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestMilestoned.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookPullRequestMilestoned
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookPullRequestMilestonedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookPullRequestMilestonedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestOpened.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestOpened.g.verified.cs
index 171449bd07..29ef043c2b 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestOpened.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestOpened.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookPullRequestOpened
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookPullRequestOpenedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookPullRequestOpenedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReadyForReview.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReadyForReview.g.verified.cs
index 806de4d108..33408493bf 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReadyForReview.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReadyForReview.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookPullRequestReadyForReview
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookPullRequestReadyForReviewAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookPullRequestReadyForReviewAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReopened.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReopened.g.verified.cs
index ddfe3f729f..284b881eb3 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReopened.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReopened.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookPullRequestReopened
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookPullRequestReopenedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookPullRequestReopenedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewCommentCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewCommentCreated.g.verified.cs
index 18242aafd9..9b1a912e3b 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewCommentCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewCommentCreated.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookPullRequestReviewCommentCreated
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookPullRequestReviewCommentCreatedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookPullRequestReviewCommentCreatedAction Action { get; set; }
 
         /// <summary>
         /// The [comment](https://docs.github.com/rest/pulls/comments#get-a-review-comment-for-a-pull-request) itself.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewCommentDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewCommentDeleted.g.verified.cs
index 66812ad826..37581e1cd2 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewCommentDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewCommentDeleted.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookPullRequestReviewCommentDeleted
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookPullRequestReviewCommentDeletedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookPullRequestReviewCommentDeletedAction Action { get; set; }
 
         /// <summary>
         /// The [comment](https://docs.github.com/rest/pulls/comments#get-a-review-comment-for-a-pull-request) itself.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewCommentEdited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewCommentEdited.g.verified.cs
index a59a95a60b..13313ceadc 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewCommentEdited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewCommentEdited.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookPullRequestReviewCommentEdited
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookPullRequestReviewCommentEditedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookPullRequestReviewCommentEditedAction Action { get; set; }
 
         /// <summary>
         /// The changes to the comment.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewDismissed.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewDismissed.g.verified.cs
index 37dd5f5e20..b2d44e12c8 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewDismissed.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewDismissed.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookPullRequestReviewDismissed
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookPullRequestReviewDismissedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookPullRequestReviewDismissedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewEdited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewEdited.g.verified.cs
index 87dbb67d80..aba0f51727 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewEdited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewEdited.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookPullRequestReviewEdited
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookPullRequestReviewEditedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookPullRequestReviewEditedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewRequestRemovedVariant1.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewRequestRemovedVariant1.g.verified.cs
index d35a8764fd..b43a31ac68 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewRequestRemovedVariant1.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewRequestRemovedVariant1.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookPullRequestReviewRequestRemovedVariant1
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookPullRequestReviewRequestRemovedVariant1Action Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookPullRequestReviewRequestRemovedVariant1Action Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewRequestRemovedVariant2.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewRequestRemovedVariant2.g.verified.cs
index 7c0fc56542..024293c2e9 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewRequestRemovedVariant2.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewRequestRemovedVariant2.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookPullRequestReviewRequestRemovedVariant2
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookPullRequestReviewRequestRemovedVariant2Action Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookPullRequestReviewRequestRemovedVariant2Action Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewRequestedVariant1.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewRequestedVariant1.g.verified.cs
index e9a9821cbb..0cd623d3e9 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewRequestedVariant1.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewRequestedVariant1.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookPullRequestReviewRequestedVariant1
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookPullRequestReviewRequestedVariant1Action Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookPullRequestReviewRequestedVariant1Action Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewRequestedVariant2.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewRequestedVariant2.g.verified.cs
index af1054f745..40e37731f6 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewRequestedVariant2.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewRequestedVariant2.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookPullRequestReviewRequestedVariant2
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookPullRequestReviewRequestedVariant2Action Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookPullRequestReviewRequestedVariant2Action Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewSubmitted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewSubmitted.g.verified.cs
index 4ca4976c01..91f3edfd57 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewSubmitted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewSubmitted.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookPullRequestReviewSubmitted
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookPullRequestReviewSubmittedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookPullRequestReviewSubmittedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewThreadResolved.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewThreadResolved.g.verified.cs
index 98e4e85a88..9aab699438 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewThreadResolved.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewThreadResolved.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookPullRequestReviewThreadResolved
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookPullRequestReviewThreadResolvedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookPullRequestReviewThreadResolvedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewThreadUnresolved.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewThreadUnresolved.g.verified.cs
index dcfa908f8a..88362a05f3 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewThreadUnresolved.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestReviewThreadUnresolved.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookPullRequestReviewThreadUnresolved
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookPullRequestReviewThreadUnresolvedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookPullRequestReviewThreadUnresolvedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestSynchronize.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestSynchronize.g.verified.cs
index 3996ca0276..946d7490c6 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestSynchronize.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestSynchronize.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookPullRequestSynchronize
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookPullRequestSynchronizeAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookPullRequestSynchronizeAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestUnassigned.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestUnassigned.g.verified.cs
index bfa088e7a1..577b779e13 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestUnassigned.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestUnassigned.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookPullRequestUnassigned
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookPullRequestUnassignedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookPullRequestUnassignedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestUnlabeled.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestUnlabeled.g.verified.cs
index ba20d4b5ef..b2a2a55821 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestUnlabeled.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestUnlabeled.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookPullRequestUnlabeled
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookPullRequestUnlabeledAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookPullRequestUnlabeledAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestUnlocked.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestUnlocked.g.verified.cs
index 276df37d28..3107d62c2a 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestUnlocked.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookPullRequestUnlocked.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookPullRequestUnlocked
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookPullRequestUnlockedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookPullRequestUnlockedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRegistryPackagePublished.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRegistryPackagePublished.g.verified.cs
index dcd535b2aa..3851cb7a22 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRegistryPackagePublished.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRegistryPackagePublished.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookRegistryPackagePublished
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookRegistryPackagePublishedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookRegistryPackagePublishedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRegistryPackageUpdated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRegistryPackageUpdated.g.verified.cs
index af6b532aa6..0e02c8748c 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRegistryPackageUpdated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRegistryPackageUpdated.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookRegistryPackageUpdated
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookRegistryPackageUpdatedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookRegistryPackageUpdatedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookReleaseCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookReleaseCreated.g.verified.cs
index 2e0a30c902..d845bc656b 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookReleaseCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookReleaseCreated.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookReleaseCreated
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookReleaseCreatedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookReleaseCreatedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookReleaseDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookReleaseDeleted.g.verified.cs
index 339ba03b0f..fb4a15146a 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookReleaseDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookReleaseDeleted.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookReleaseDeleted
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookReleaseDeletedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookReleaseDeletedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookReleaseEdited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookReleaseEdited.g.verified.cs
index b6aa84d3a9..5b2d4e2cae 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookReleaseEdited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookReleaseEdited.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookReleaseEdited
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookReleaseEditedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookReleaseEditedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookReleasePrereleased.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookReleasePrereleased.g.verified.cs
index 356a4558e1..433c3d8f92 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookReleasePrereleased.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookReleasePrereleased.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookReleasePrereleased
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookReleasePrereleasedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookReleasePrereleasedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookReleasePrereleasedReleaseAsset.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookReleasePrereleasedReleaseAsset.g.verified.cs
index 6879d8bc55..abce443c93 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookReleasePrereleasedReleaseAsset.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookReleasePrereleasedReleaseAsset.g.verified.cs
@@ -66,8 +66,8 @@ public sealed partial class WebhookReleasePrereleasedReleaseAsset
         /// <summary>
         /// State of the release asset.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("state", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookReleasePrereleasedReleaseAssetState State { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("state")]
+        public global::G.WebhookReleasePrereleasedReleaseAssetState State { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookReleasePublished.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookReleasePublished.g.verified.cs
index 86b8417939..a209d451d2 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookReleasePublished.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookReleasePublished.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookReleasePublished
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookReleasePublishedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookReleasePublishedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookReleaseReleased.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookReleaseReleased.g.verified.cs
index 76b36baa59..e4f933052d 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookReleaseReleased.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookReleaseReleased.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookReleaseReleased
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookReleaseReleasedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookReleaseReleasedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookReleaseUnpublished.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookReleaseUnpublished.g.verified.cs
index 3fa79aadd2..05f4bc849c 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookReleaseUnpublished.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookReleaseUnpublished.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookReleaseUnpublished
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookReleaseUnpublishedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookReleaseUnpublishedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryAdvisoryPublished.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryAdvisoryPublished.g.verified.cs
index ec1341ef26..8e7e250573 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryAdvisoryPublished.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryAdvisoryPublished.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookRepositoryAdvisoryPublished
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookRepositoryAdvisoryPublishedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookRepositoryAdvisoryPublishedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryAdvisoryReported.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryAdvisoryReported.g.verified.cs
index f79ba515fd..b0904da255 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryAdvisoryReported.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryAdvisoryReported.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookRepositoryAdvisoryReported
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookRepositoryAdvisoryReportedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookRepositoryAdvisoryReportedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryArchived.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryArchived.g.verified.cs
index 968ed0ecc9..b10abdeced 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryArchived.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryArchived.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookRepositoryArchived
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookRepositoryArchivedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookRepositoryArchivedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryCreated.g.verified.cs
index 09d33098ca..f8d5a5b820 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryCreated.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookRepositoryCreated
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookRepositoryCreatedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookRepositoryCreatedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryDeleted.g.verified.cs
index 64f3d21c13..6b5138f99e 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryDeleted.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookRepositoryDeleted
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookRepositoryDeletedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookRepositoryDeletedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryEdited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryEdited.g.verified.cs
index 6e1c68badd..1bee09519a 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryEdited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryEdited.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookRepositoryEdited
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookRepositoryEditedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookRepositoryEditedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryPrivatized.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryPrivatized.g.verified.cs
index d17e4b5ce2..4726de488c 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryPrivatized.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryPrivatized.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookRepositoryPrivatized
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookRepositoryPrivatizedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookRepositoryPrivatizedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryPublicized.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryPublicized.g.verified.cs
index 85b0e894a9..12d2cf79f7 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryPublicized.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryPublicized.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookRepositoryPublicized
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookRepositoryPublicizedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookRepositoryPublicizedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryRenamed.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryRenamed.g.verified.cs
index c35ccecabb..3becf71c10 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryRenamed.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryRenamed.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookRepositoryRenamed
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookRepositoryRenamedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookRepositoryRenamedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryRulesetCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryRulesetCreated.g.verified.cs
index f611939c9d..b4bdf8a1d2 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryRulesetCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryRulesetCreated.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookRepositoryRulesetCreated
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookRepositoryRulesetCreatedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookRepositoryRulesetCreatedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryRulesetDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryRulesetDeleted.g.verified.cs
index 47745ce105..5137247f86 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryRulesetDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryRulesetDeleted.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookRepositoryRulesetDeleted
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookRepositoryRulesetDeletedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookRepositoryRulesetDeletedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryRulesetEdited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryRulesetEdited.g.verified.cs
index 2619ee430b..a4da4df192 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryRulesetEdited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryRulesetEdited.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookRepositoryRulesetEdited
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookRepositoryRulesetEditedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookRepositoryRulesetEditedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryTransferred.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryTransferred.g.verified.cs
index 301026c2a6..25fb96aff5 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryTransferred.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryTransferred.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookRepositoryTransferred
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookRepositoryTransferredAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookRepositoryTransferredAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryUnarchived.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryUnarchived.g.verified.cs
index 50ecd627e7..5a4078ce64 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryUnarchived.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryUnarchived.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookRepositoryUnarchived
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookRepositoryUnarchivedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookRepositoryUnarchivedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryVulnerabilityAlertCreate.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryVulnerabilityAlertCreate.g.verified.cs
index 3b13f78c79..cd28092d32 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryVulnerabilityAlertCreate.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryVulnerabilityAlertCreate.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookRepositoryVulnerabilityAlertCreate
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookRepositoryVulnerabilityAlertCreateAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookRepositoryVulnerabilityAlertCreateAction Action { get; set; }
 
         /// <summary>
         /// The security alert of the vulnerable dependency.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryVulnerabilityAlertDismiss.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryVulnerabilityAlertDismiss.g.verified.cs
index 4fe84491b7..964aafa3a5 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryVulnerabilityAlertDismiss.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryVulnerabilityAlertDismiss.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookRepositoryVulnerabilityAlertDismiss
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookRepositoryVulnerabilityAlertDismissAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookRepositoryVulnerabilityAlertDismissAction Action { get; set; }
 
         /// <summary>
         /// The security alert of the vulnerable dependency.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryVulnerabilityAlertDismissAlert.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryVulnerabilityAlertDismissAlert.g.verified.cs
index df00ae8eb8..d9b4e6c4a2 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryVulnerabilityAlertDismissAlert.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryVulnerabilityAlertDismissAlert.g.verified.cs
@@ -114,8 +114,8 @@ public sealed partial class WebhookRepositoryVulnerabilityAlertDismissAlert
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("state", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookRepositoryVulnerabilityAlertDismissAlertState State { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("state")]
+        public global::G.WebhookRepositoryVulnerabilityAlertDismissAlertState State { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryVulnerabilityAlertReopen.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryVulnerabilityAlertReopen.g.verified.cs
index 1465cfc5c2..c1e049bfb5 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryVulnerabilityAlertReopen.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryVulnerabilityAlertReopen.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookRepositoryVulnerabilityAlertReopen
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookRepositoryVulnerabilityAlertReopenAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookRepositoryVulnerabilityAlertReopenAction Action { get; set; }
 
         /// <summary>
         /// The security alert of the vulnerable dependency.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryVulnerabilityAlertResolve.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryVulnerabilityAlertResolve.g.verified.cs
index aa5bf8e86f..54c6af9423 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryVulnerabilityAlertResolve.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookRepositoryVulnerabilityAlertResolve.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookRepositoryVulnerabilityAlertResolve
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookRepositoryVulnerabilityAlertResolveAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookRepositoryVulnerabilityAlertResolveAction Action { get; set; }
 
         /// <summary>
         /// The security alert of the vulnerable dependency.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSecretScanningAlertCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSecretScanningAlertCreated.g.verified.cs
index 17e78ed4a5..4f36bd046b 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSecretScanningAlertCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSecretScanningAlertCreated.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookSecretScanningAlertCreated
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookSecretScanningAlertCreatedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookSecretScanningAlertCreatedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSecretScanningAlertReopened.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSecretScanningAlertReopened.g.verified.cs
index 635361b145..85c93e3944 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSecretScanningAlertReopened.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSecretScanningAlertReopened.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookSecretScanningAlertReopened
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookSecretScanningAlertReopenedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookSecretScanningAlertReopenedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSecretScanningAlertResolved.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSecretScanningAlertResolved.g.verified.cs
index 6f852907a0..5dcb540cec 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSecretScanningAlertResolved.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSecretScanningAlertResolved.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookSecretScanningAlertResolved
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookSecretScanningAlertResolvedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookSecretScanningAlertResolvedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSecretScanningAlertRevoked.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSecretScanningAlertRevoked.g.verified.cs
index bc4ef08c6b..6e71665cb9 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSecretScanningAlertRevoked.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSecretScanningAlertRevoked.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookSecretScanningAlertRevoked
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookSecretScanningAlertRevokedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookSecretScanningAlertRevokedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSecretScanningAlertValidated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSecretScanningAlertValidated.g.verified.cs
index 7a1c1a346c..50c1715909 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSecretScanningAlertValidated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSecretScanningAlertValidated.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookSecretScanningAlertValidated
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookSecretScanningAlertValidatedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookSecretScanningAlertValidatedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSecurityAdvisoryPublished.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSecurityAdvisoryPublished.g.verified.cs
index 8cc6810c86..ef36e31cb1 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSecurityAdvisoryPublished.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSecurityAdvisoryPublished.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookSecurityAdvisoryPublished
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookSecurityAdvisoryPublishedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookSecurityAdvisoryPublishedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSecurityAdvisoryUpdated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSecurityAdvisoryUpdated.g.verified.cs
index b1fb1ea0fa..20503ba59e 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSecurityAdvisoryUpdated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSecurityAdvisoryUpdated.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookSecurityAdvisoryUpdated
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookSecurityAdvisoryUpdatedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookSecurityAdvisoryUpdatedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSecurityAdvisoryWithdrawn.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSecurityAdvisoryWithdrawn.g.verified.cs
index 1132925adf..4ecf6c4e8e 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSecurityAdvisoryWithdrawn.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSecurityAdvisoryWithdrawn.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookSecurityAdvisoryWithdrawn
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookSecurityAdvisoryWithdrawnAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookSecurityAdvisoryWithdrawnAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSponsorshipCancelled.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSponsorshipCancelled.g.verified.cs
index cd72ab2f36..4226460e83 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSponsorshipCancelled.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSponsorshipCancelled.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookSponsorshipCancelled
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookSponsorshipCancelledAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookSponsorshipCancelledAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSponsorshipCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSponsorshipCreated.g.verified.cs
index 5626f985e8..2c919e5a79 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSponsorshipCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSponsorshipCreated.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookSponsorshipCreated
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookSponsorshipCreatedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookSponsorshipCreatedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSponsorshipEdited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSponsorshipEdited.g.verified.cs
index 5d3d379e55..417ce00a94 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSponsorshipEdited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSponsorshipEdited.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookSponsorshipEdited
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookSponsorshipEditedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookSponsorshipEditedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSponsorshipPendingCancellation.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSponsorshipPendingCancellation.g.verified.cs
index fbf921ef48..affeb19964 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSponsorshipPendingCancellation.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSponsorshipPendingCancellation.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookSponsorshipPendingCancellation
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookSponsorshipPendingCancellationAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookSponsorshipPendingCancellationAction Action { get; set; }
 
         /// <summary>
         /// The `pending_cancellation` and `pending_tier_change` event types will include the date the cancellation or tier change will take effect.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSponsorshipPendingTierChange.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSponsorshipPendingTierChange.g.verified.cs
index cda6b4ca9d..bd1f2bdea3 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSponsorshipPendingTierChange.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSponsorshipPendingTierChange.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookSponsorshipPendingTierChange
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookSponsorshipPendingTierChangeAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookSponsorshipPendingTierChangeAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSponsorshipTierChanged.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSponsorshipTierChanged.g.verified.cs
index 34b3b4f171..d2fb267c58 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSponsorshipTierChanged.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookSponsorshipTierChanged.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookSponsorshipTierChanged
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookSponsorshipTierChangedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookSponsorshipTierChangedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookStarCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookStarCreated.g.verified.cs
index f72bb9c829..b4d5ee62e2 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookStarCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookStarCreated.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookStarCreated
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookStarCreatedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookStarCreatedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookStarDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookStarDeleted.g.verified.cs
index e7edbd3fdc..79b6c8d766 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookStarDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookStarDeleted.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookStarDeleted
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookStarDeletedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookStarDeletedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookTeamAddedToRepository.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookTeamAddedToRepository.g.verified.cs
index ff61787b52..7d8918f28b 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookTeamAddedToRepository.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookTeamAddedToRepository.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookTeamAddedToRepository
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookTeamAddedToRepositoryAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookTeamAddedToRepositoryAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookTeamCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookTeamCreated.g.verified.cs
index b2b7d028d8..bf4f6c8e0e 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookTeamCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookTeamCreated.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookTeamCreated
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookTeamCreatedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookTeamCreatedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookTeamDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookTeamDeleted.g.verified.cs
index d0e0cc7520..832b71debd 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookTeamDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookTeamDeleted.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookTeamDeleted
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookTeamDeletedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookTeamDeletedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookTeamEdited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookTeamEdited.g.verified.cs
index 19ac3c2afa..3079f205d8 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookTeamEdited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookTeamEdited.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookTeamEdited
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookTeamEditedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookTeamEditedAction Action { get; set; }
 
         /// <summary>
         /// The changes to the team if the action was `edited`.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookTeamRemovedFromRepository.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookTeamRemovedFromRepository.g.verified.cs
index 06f97f2962..8700481903 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookTeamRemovedFromRepository.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookTeamRemovedFromRepository.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookTeamRemovedFromRepository
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookTeamRemovedFromRepositoryAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookTeamRemovedFromRepositoryAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookWatchStarted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookWatchStarted.g.verified.cs
index e06bb2f569..31208d86c2 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookWatchStarted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookWatchStarted.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookWatchStarted
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookWatchStartedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookWatchStartedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookWorkflowJobCompleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookWorkflowJobCompleted.g.verified.cs
index d80c8c55fa..c0783a9c24 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookWorkflowJobCompleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookWorkflowJobCompleted.g.verified.cs
@@ -14,8 +14,8 @@ public sealed partial class WebhookWorkflowJobCompleted
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookWorkflowJobCompletedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookWorkflowJobCompletedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookWorkflowJobInProgress.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookWorkflowJobInProgress.g.verified.cs
index 233f21902a..a1f0aec82e 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookWorkflowJobInProgress.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookWorkflowJobInProgress.g.verified.cs
@@ -14,8 +14,8 @@ public sealed partial class WebhookWorkflowJobInProgress
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookWorkflowJobInProgressAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookWorkflowJobInProgressAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookWorkflowJobQueued.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookWorkflowJobQueued.g.verified.cs
index e6a4fe4284..9068845e2d 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookWorkflowJobQueued.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookWorkflowJobQueued.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookWorkflowJobQueued
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookWorkflowJobQueuedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookWorkflowJobQueuedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookWorkflowJobWaiting.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookWorkflowJobWaiting.g.verified.cs
index 53e0112d1c..e33828eb31 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookWorkflowJobWaiting.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookWorkflowJobWaiting.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookWorkflowJobWaiting
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookWorkflowJobWaitingAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookWorkflowJobWaitingAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookWorkflowRunCompleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookWorkflowRunCompleted.g.verified.cs
index 57a73d819d..cff1f67f67 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookWorkflowRunCompleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookWorkflowRunCompleted.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookWorkflowRunCompleted
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookWorkflowRunCompletedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookWorkflowRunCompletedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookWorkflowRunInProgress.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookWorkflowRunInProgress.g.verified.cs
index f3ecb76423..d1965ceceb 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookWorkflowRunInProgress.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookWorkflowRunInProgress.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookWorkflowRunInProgress
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookWorkflowRunInProgressAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookWorkflowRunInProgressAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookWorkflowRunRequested.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookWorkflowRunRequested.g.verified.cs
index 57f3bfac40..2820fa5035 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookWorkflowRunRequested.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhookWorkflowRunRequested.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class WebhookWorkflowRunRequested
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("action", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhookWorkflowRunRequestedAction Action { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("action")]
+        public global::G.WebhookWorkflowRunRequestedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhooksAlert.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhooksAlert.g.verified.cs
index db63bc33d7..a303660d10 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhooksAlert.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhooksAlert.g.verified.cs
@@ -108,8 +108,8 @@ public sealed partial class WebhooksAlert
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("state", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhooksAlertState State { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("state")]
+        public global::G.WebhooksAlertState State { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhooksRelease1Asset.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhooksRelease1Asset.g.verified.cs
index 7bb4cbd7c0..fe3723c760 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhooksRelease1Asset.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhooksRelease1Asset.g.verified.cs
@@ -66,8 +66,8 @@ public sealed partial class WebhooksRelease1Asset
         /// <summary>
         /// State of the release asset.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("state", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhooksRelease1AssetState State { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("state")]
+        public global::G.WebhooksRelease1AssetState State { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhooksReleaseAsset.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhooksReleaseAsset.g.verified.cs
index cb8374ca5d..267af015f8 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhooksReleaseAsset.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.Models.WebhooksReleaseAsset.g.verified.cs
@@ -66,8 +66,8 @@ public sealed partial class WebhooksReleaseAsset
         /// <summary>
         /// State of the release asset.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("state", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.WebhooksReleaseAssetState State { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("state")]
+        public global::G.WebhooksReleaseAssetState State { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.OrgsClient.OrgsUpdateMembershipForAuthenticatedUser.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.OrgsClient.OrgsUpdateMembershipForAuthenticatedUser.g.verified.cs
index d1ddf64ba2..79188cf85f 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.OrgsClient.OrgsUpdateMembershipForAuthenticatedUser.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.OrgsClient.OrgsUpdateMembershipForAuthenticatedUser.g.verified.cs
@@ -114,7 +114,7 @@ partial void ProcessOrgsUpdateMembershipForAuthenticatedUserResponseContent(
         /// <exception cref="global::System.InvalidOperationException"></exception>
         public async global::System.Threading.Tasks.Task<global::G.OrgMembership> OrgsUpdateMembershipForAuthenticatedUserAsync(
             string org,
-            global::G.OrgsUpdateMembershipForAuthenticatedUserRequestState state,
+            global::G.OrgsUpdateMembershipForAuthenticatedUserRequestState state = default,
             global::System.Threading.CancellationToken cancellationToken = default)
         {
             var request = new global::G.OrgsUpdateMembershipForAuthenticatedUserRequest
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.OrgsClient.OrgsUpdatePatAccess.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.OrgsClient.OrgsUpdatePatAccess.g.verified.cs
index 87f8801e3a..55ca15dcf0 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.OrgsClient.OrgsUpdatePatAccess.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.OrgsClient.OrgsUpdatePatAccess.g.verified.cs
@@ -124,7 +124,7 @@ partial void ProcessOrgsUpdatePatAccessResponseContent(
         public async global::System.Threading.Tasks.Task<global::G.BasicError> OrgsUpdatePatAccessAsync(
             string org,
             int patId,
-            global::G.OrgsUpdatePatAccessRequestAction action,
+            global::G.OrgsUpdatePatAccessRequestAction action = default,
             global::System.Threading.CancellationToken cancellationToken = default)
         {
             var request = new global::G.OrgsUpdatePatAccessRequest
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.OrgsClient.OrgsUpdatePatAccesses.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.OrgsClient.OrgsUpdatePatAccesses.g.verified.cs
index 56ddf81c43..017b662204 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.OrgsClient.OrgsUpdatePatAccesses.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/NewtonsoftJson/_#G.OrgsClient.OrgsUpdatePatAccesses.g.verified.cs
@@ -119,8 +119,8 @@ partial void ProcessOrgsUpdatePatAccessesResponseContent(
         /// <exception cref="global::System.InvalidOperationException"></exception>
         public async global::System.Threading.Tasks.Task<global::G.BasicError> OrgsUpdatePatAccessesAsync(
             string org,
-            global::G.OrgsUpdatePatAccessesRequestAction action,
             global::System.Collections.Generic.IList<int> patIds,
+            global::G.OrgsUpdatePatAccessesRequestAction action = default,
             global::System.Threading.CancellationToken cancellationToken = default)
         {
             var request = new global::G.OrgsUpdatePatAccessesRequest
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.ContentFile.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.ContentFile.g.verified.cs
index 3ebd692707..61fc9686e8 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.ContentFile.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.ContentFile.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class ContentFile
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ContentFileTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ContentFileType Type { get; set; } = global::G.ContentFileType.File;
+        public global::G.ContentFileType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.ContentSubmodule.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.ContentSubmodule.g.verified.cs
index 8bcd4bab6d..80e7347f0a 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.ContentSubmodule.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.ContentSubmodule.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class ContentSubmodule
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ContentSubmoduleTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ContentSubmoduleType Type { get; set; } = global::G.ContentSubmoduleType.Submodule;
+        public global::G.ContentSubmoduleType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.ContentSymlink.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.ContentSymlink.g.verified.cs
index 47ffe11dd3..4f71b34961 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.ContentSymlink.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.ContentSymlink.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class ContentSymlink
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ContentSymlinkTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ContentSymlinkType Type { get; set; } = global::G.ContentSymlinkType.Symlink;
+        public global::G.ContentSymlinkType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.OrgsUpdateMembershipForAuthenticatedUserRequest.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.OrgsUpdateMembershipForAuthenticatedUserRequest.g.verified.cs
index 7d3b5c6e80..d06971cf92 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.OrgsUpdateMembershipForAuthenticatedUserRequest.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.OrgsUpdateMembershipForAuthenticatedUserRequest.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class OrgsUpdateMembershipForAuthenticatedUserRequest
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("state")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.OrgsUpdateMembershipForAuthenticatedUserRequestStateJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.OrgsUpdateMembershipForAuthenticatedUserRequestState State { get; set; } = global::G.OrgsUpdateMembershipForAuthenticatedUserRequestState.Active;
+        public global::G.OrgsUpdateMembershipForAuthenticatedUserRequestState State { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.OrgsUpdatePatAccessRequest.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.OrgsUpdatePatAccessRequest.g.verified.cs
index e0aba46958..2473ec41e8 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.OrgsUpdatePatAccessRequest.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.OrgsUpdatePatAccessRequest.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class OrgsUpdatePatAccessRequest
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.OrgsUpdatePatAccessRequestActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.OrgsUpdatePatAccessRequestAction Action { get; set; } = global::G.OrgsUpdatePatAccessRequestAction.Revoke;
+        public global::G.OrgsUpdatePatAccessRequestAction Action { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.OrgsUpdatePatAccessesRequest.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.OrgsUpdatePatAccessesRequest.g.verified.cs
index 0670bcd811..8b5aadc4d1 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.OrgsUpdatePatAccessesRequest.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.OrgsUpdatePatAccessesRequest.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class OrgsUpdatePatAccessesRequest
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.OrgsUpdatePatAccessesRequestActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.OrgsUpdatePatAccessesRequestAction Action { get; set; } = global::G.OrgsUpdatePatAccessesRequestAction.Revoke;
+        public global::G.OrgsUpdatePatAccessesRequestAction Action { get; set; }
 
         /// <summary>
         /// The IDs of the fine-grained personal access tokens.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleBranchNamePattern.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleBranchNamePattern.g.verified.cs
index 2fd525e8af..41b750b8b6 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleBranchNamePattern.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleBranchNamePattern.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class RepositoryRuleBranchNamePattern
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RepositoryRuleBranchNamePatternTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RepositoryRuleBranchNamePatternType Type { get; set; } = global::G.RepositoryRuleBranchNamePatternType.BranchNamePattern;
+        public global::G.RepositoryRuleBranchNamePatternType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleCodeScanning.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleCodeScanning.g.verified.cs
index 6d6cf8785d..eebed5b1ff 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleCodeScanning.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleCodeScanning.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class RepositoryRuleCodeScanning
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RepositoryRuleCodeScanningTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RepositoryRuleCodeScanningType Type { get; set; } = global::G.RepositoryRuleCodeScanningType.CodeScanning;
+        public global::G.RepositoryRuleCodeScanningType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleCommitAuthorEmailPattern.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleCommitAuthorEmailPattern.g.verified.cs
index dae128ada1..afc711b543 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleCommitAuthorEmailPattern.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleCommitAuthorEmailPattern.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class RepositoryRuleCommitAuthorEmailPattern
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RepositoryRuleCommitAuthorEmailPatternTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RepositoryRuleCommitAuthorEmailPatternType Type { get; set; } = global::G.RepositoryRuleCommitAuthorEmailPatternType.CommitAuthorEmailPattern;
+        public global::G.RepositoryRuleCommitAuthorEmailPatternType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleCommitMessagePattern.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleCommitMessagePattern.g.verified.cs
index 8a590c9715..bd212cf78c 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleCommitMessagePattern.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleCommitMessagePattern.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class RepositoryRuleCommitMessagePattern
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RepositoryRuleCommitMessagePatternTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RepositoryRuleCommitMessagePatternType Type { get; set; } = global::G.RepositoryRuleCommitMessagePatternType.CommitMessagePattern;
+        public global::G.RepositoryRuleCommitMessagePatternType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleCommitterEmailPattern.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleCommitterEmailPattern.g.verified.cs
index f7f7240259..d8ed9162e9 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleCommitterEmailPattern.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleCommitterEmailPattern.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class RepositoryRuleCommitterEmailPattern
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RepositoryRuleCommitterEmailPatternTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RepositoryRuleCommitterEmailPatternType Type { get; set; } = global::G.RepositoryRuleCommitterEmailPatternType.CommitterEmailPattern;
+        public global::G.RepositoryRuleCommitterEmailPatternType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleCreation.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleCreation.g.verified.cs
index 189de49687..1997d6c9ea 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleCreation.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleCreation.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class RepositoryRuleCreation
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RepositoryRuleCreationTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RepositoryRuleCreationType Type { get; set; } = global::G.RepositoryRuleCreationType.Creation;
+        public global::G.RepositoryRuleCreationType Type { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleDeletion.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleDeletion.g.verified.cs
index 2b422dec5c..2822429b4d 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleDeletion.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleDeletion.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class RepositoryRuleDeletion
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RepositoryRuleDeletionTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RepositoryRuleDeletionType Type { get; set; } = global::G.RepositoryRuleDeletionType.Deletion;
+        public global::G.RepositoryRuleDeletionType Type { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleNonFastForward.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleNonFastForward.g.verified.cs
index 004c73ec9c..cabc2da3c8 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleNonFastForward.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleNonFastForward.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class RepositoryRuleNonFastForward
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RepositoryRuleNonFastForwardTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RepositoryRuleNonFastForwardType Type { get; set; } = global::G.RepositoryRuleNonFastForwardType.NonFastForward;
+        public global::G.RepositoryRuleNonFastForwardType Type { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRulePullRequest.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRulePullRequest.g.verified.cs
index dc42fc4dfd..10ae2479be 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRulePullRequest.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRulePullRequest.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class RepositoryRulePullRequest
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RepositoryRulePullRequestTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RepositoryRulePullRequestType Type { get; set; } = global::G.RepositoryRulePullRequestType.PullRequest;
+        public global::G.RepositoryRulePullRequestType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleRequiredDeployments.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleRequiredDeployments.g.verified.cs
index ae5f2f624d..7ad4d738b1 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleRequiredDeployments.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleRequiredDeployments.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class RepositoryRuleRequiredDeployments
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RepositoryRuleRequiredDeploymentsTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RepositoryRuleRequiredDeploymentsType Type { get; set; } = global::G.RepositoryRuleRequiredDeploymentsType.RequiredDeployments;
+        public global::G.RepositoryRuleRequiredDeploymentsType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleRequiredLinearHistory.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleRequiredLinearHistory.g.verified.cs
index dc76352e77..1ce29676a4 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleRequiredLinearHistory.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleRequiredLinearHistory.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class RepositoryRuleRequiredLinearHistory
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RepositoryRuleRequiredLinearHistoryTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RepositoryRuleRequiredLinearHistoryType Type { get; set; } = global::G.RepositoryRuleRequiredLinearHistoryType.RequiredLinearHistory;
+        public global::G.RepositoryRuleRequiredLinearHistoryType Type { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleRequiredSignatures.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleRequiredSignatures.g.verified.cs
index 9bc8c2e514..2d1eaecc1e 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleRequiredSignatures.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleRequiredSignatures.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class RepositoryRuleRequiredSignatures
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RepositoryRuleRequiredSignaturesTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RepositoryRuleRequiredSignaturesType Type { get; set; } = global::G.RepositoryRuleRequiredSignaturesType.RequiredSignatures;
+        public global::G.RepositoryRuleRequiredSignaturesType Type { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleRequiredStatusChecks.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleRequiredStatusChecks.g.verified.cs
index e74faa26da..2dd23e59d1 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleRequiredStatusChecks.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleRequiredStatusChecks.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class RepositoryRuleRequiredStatusChecks
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RepositoryRuleRequiredStatusChecksTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RepositoryRuleRequiredStatusChecksType Type { get; set; } = global::G.RepositoryRuleRequiredStatusChecksType.RequiredStatusChecks;
+        public global::G.RepositoryRuleRequiredStatusChecksType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleTagNamePattern.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleTagNamePattern.g.verified.cs
index 321b9a631e..b10bc9ccfc 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleTagNamePattern.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleTagNamePattern.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class RepositoryRuleTagNamePattern
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RepositoryRuleTagNamePatternTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RepositoryRuleTagNamePatternType Type { get; set; } = global::G.RepositoryRuleTagNamePatternType.TagNamePattern;
+        public global::G.RepositoryRuleTagNamePatternType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleUpdate.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleUpdate.g.verified.cs
index f191a572fd..7bf1457ce3 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleUpdate.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleUpdate.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class RepositoryRuleUpdate
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RepositoryRuleUpdateTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RepositoryRuleUpdateType Type { get; set; } = global::G.RepositoryRuleUpdateType.Update;
+        public global::G.RepositoryRuleUpdateType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleVariant15.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleVariant15.g.verified.cs
index 5f744479d5..6a48d02395 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleVariant15.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleVariant15.g.verified.cs
@@ -15,8 +15,7 @@ public sealed partial class RepositoryRuleVariant15
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RepositoryRuleVariant15TypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RepositoryRuleVariant15Type Type { get; set; } = global::G.RepositoryRuleVariant15Type.FilePathRestriction;
+        public global::G.RepositoryRuleVariant15Type Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleVariant16.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleVariant16.g.verified.cs
index e186889e38..cd89178d6e 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleVariant16.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleVariant16.g.verified.cs
@@ -15,8 +15,7 @@ public sealed partial class RepositoryRuleVariant16
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RepositoryRuleVariant16TypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RepositoryRuleVariant16Type Type { get; set; } = global::G.RepositoryRuleVariant16Type.MaxFilePathLength;
+        public global::G.RepositoryRuleVariant16Type Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleVariant17.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleVariant17.g.verified.cs
index 6b98e9b63a..635ce4ec83 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleVariant17.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleVariant17.g.verified.cs
@@ -15,8 +15,7 @@ public sealed partial class RepositoryRuleVariant17
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RepositoryRuleVariant17TypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RepositoryRuleVariant17Type Type { get; set; } = global::G.RepositoryRuleVariant17Type.FileExtensionRestriction;
+        public global::G.RepositoryRuleVariant17Type Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleVariant18.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleVariant18.g.verified.cs
index 7978ed264a..5fb2e34c9b 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleVariant18.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleVariant18.g.verified.cs
@@ -15,8 +15,7 @@ public sealed partial class RepositoryRuleVariant18
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RepositoryRuleVariant18TypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RepositoryRuleVariant18Type Type { get; set; } = global::G.RepositoryRuleVariant18Type.MaxFileSize;
+        public global::G.RepositoryRuleVariant18Type Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleWorkflows.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleWorkflows.g.verified.cs
index 59c285db07..ee23fd3f12 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleWorkflows.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.RepositoryRuleWorkflows.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class RepositoryRuleWorkflows
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RepositoryRuleWorkflowsTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RepositoryRuleWorkflowsType Type { get; set; } = global::G.RepositoryRuleWorkflowsType.Workflows;
+        public global::G.RepositoryRuleWorkflowsType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookBranchProtectionConfigurationDisabled.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookBranchProtectionConfigurationDisabled.g.verified.cs
index 05ac4fb924..fc783ffefd 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookBranchProtectionConfigurationDisabled.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookBranchProtectionConfigurationDisabled.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookBranchProtectionConfigurationDisabled
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookBranchProtectionConfigurationDisabledActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookBranchProtectionConfigurationDisabledAction Action { get; set; } = global::G.WebhookBranchProtectionConfigurationDisabledAction.Disabled;
+        public global::G.WebhookBranchProtectionConfigurationDisabledAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookBranchProtectionConfigurationEnabled.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookBranchProtectionConfigurationEnabled.g.verified.cs
index 3f2b40836f..8e4031c60b 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookBranchProtectionConfigurationEnabled.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookBranchProtectionConfigurationEnabled.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookBranchProtectionConfigurationEnabled
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookBranchProtectionConfigurationEnabledActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookBranchProtectionConfigurationEnabledAction Action { get; set; } = global::G.WebhookBranchProtectionConfigurationEnabledAction.Enabled;
+        public global::G.WebhookBranchProtectionConfigurationEnabledAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookBranchProtectionRuleCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookBranchProtectionRuleCreated.g.verified.cs
index 83be28ee5d..304ad8b1bf 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookBranchProtectionRuleCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookBranchProtectionRuleCreated.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookBranchProtectionRuleCreated
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookBranchProtectionRuleCreatedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookBranchProtectionRuleCreatedAction Action { get; set; } = global::G.WebhookBranchProtectionRuleCreatedAction.Created;
+        public global::G.WebhookBranchProtectionRuleCreatedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookBranchProtectionRuleDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookBranchProtectionRuleDeleted.g.verified.cs
index e41c9d8d07..ba5d4baa21 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookBranchProtectionRuleDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookBranchProtectionRuleDeleted.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookBranchProtectionRuleDeleted
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookBranchProtectionRuleDeletedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookBranchProtectionRuleDeletedAction Action { get; set; } = global::G.WebhookBranchProtectionRuleDeletedAction.Deleted;
+        public global::G.WebhookBranchProtectionRuleDeletedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookBranchProtectionRuleEdited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookBranchProtectionRuleEdited.g.verified.cs
index d3b0592e2b..72d830c986 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookBranchProtectionRuleEdited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookBranchProtectionRuleEdited.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookBranchProtectionRuleEdited
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookBranchProtectionRuleEditedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookBranchProtectionRuleEditedAction Action { get; set; } = global::G.WebhookBranchProtectionRuleEditedAction.Edited;
+        public global::G.WebhookBranchProtectionRuleEditedAction Action { get; set; }
 
         /// <summary>
         /// If the action was `edited`, the changes to the rule.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCheckRunRequestedAction.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCheckRunRequestedAction.g.verified.cs
index 0a5f5e0ada..5729ef7d4b 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCheckRunRequestedAction.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCheckRunRequestedAction.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookCheckRunRequestedAction
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookCheckRunRequestedActionActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookCheckRunRequestedActionAction Action { get; set; } = global::G.WebhookCheckRunRequestedActionAction.RequestedAction;
+        public global::G.WebhookCheckRunRequestedActionAction Action { get; set; }
 
         /// <summary>
         /// A check performed on the code of a given code change
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCheckSuiteCompleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCheckSuiteCompleted.g.verified.cs
index bf4b168ef0..ce74ac48ba 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCheckSuiteCompleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCheckSuiteCompleted.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookCheckSuiteCompleted
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookCheckSuiteCompletedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookCheckSuiteCompletedAction Action { get; set; } = global::G.WebhookCheckSuiteCompletedAction.Completed;
+        public global::G.WebhookCheckSuiteCompletedAction Action { get; set; }
 
         /// <summary>
         /// The [check_suite](https://docs.github.com/rest/checks/suites#get-a-check-suite).
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCheckSuiteRequested.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCheckSuiteRequested.g.verified.cs
index 80aafd2674..a37303114d 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCheckSuiteRequested.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCheckSuiteRequested.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookCheckSuiteRequested
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookCheckSuiteRequestedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookCheckSuiteRequestedAction Action { get; set; } = global::G.WebhookCheckSuiteRequestedAction.Requested;
+        public global::G.WebhookCheckSuiteRequestedAction Action { get; set; }
 
         /// <summary>
         /// The [check_suite](https://docs.github.com/rest/checks/suites#get-a-check-suite).
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCheckSuiteRerequested.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCheckSuiteRerequested.g.verified.cs
index cbb573531a..370e1c7ab2 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCheckSuiteRerequested.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCheckSuiteRerequested.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookCheckSuiteRerequested
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookCheckSuiteRerequestedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookCheckSuiteRerequestedAction Action { get; set; } = global::G.WebhookCheckSuiteRerequestedAction.Rerequested;
+        public global::G.WebhookCheckSuiteRerequestedAction Action { get; set; }
 
         /// <summary>
         /// The [check_suite](https://docs.github.com/rest/checks/suites#get-a-check-suite).
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCodeScanningAlertAppearedInBranch.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCodeScanningAlertAppearedInBranch.g.verified.cs
index 162b7f4243..5356ed65ef 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCodeScanningAlertAppearedInBranch.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCodeScanningAlertAppearedInBranch.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookCodeScanningAlertAppearedInBranch
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookCodeScanningAlertAppearedInBranchActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookCodeScanningAlertAppearedInBranchAction Action { get; set; } = global::G.WebhookCodeScanningAlertAppearedInBranchAction.AppearedInBranch;
+        public global::G.WebhookCodeScanningAlertAppearedInBranchAction Action { get; set; }
 
         /// <summary>
         /// The code scanning alert involved in the event.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCodeScanningAlertClosedByUser.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCodeScanningAlertClosedByUser.g.verified.cs
index 74854d15e7..88301183d0 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCodeScanningAlertClosedByUser.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCodeScanningAlertClosedByUser.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookCodeScanningAlertClosedByUser
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookCodeScanningAlertClosedByUserActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookCodeScanningAlertClosedByUserAction Action { get; set; } = global::G.WebhookCodeScanningAlertClosedByUserAction.ClosedByUser;
+        public global::G.WebhookCodeScanningAlertClosedByUserAction Action { get; set; }
 
         /// <summary>
         /// The code scanning alert involved in the event.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCodeScanningAlertCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCodeScanningAlertCreated.g.verified.cs
index fec832c14c..51e06fc434 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCodeScanningAlertCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCodeScanningAlertCreated.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookCodeScanningAlertCreated
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookCodeScanningAlertCreatedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookCodeScanningAlertCreatedAction Action { get; set; } = global::G.WebhookCodeScanningAlertCreatedAction.Created;
+        public global::G.WebhookCodeScanningAlertCreatedAction Action { get; set; }
 
         /// <summary>
         /// The code scanning alert involved in the event.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCodeScanningAlertFixed.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCodeScanningAlertFixed.g.verified.cs
index 66b7c2fe52..79c9388a4a 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCodeScanningAlertFixed.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCodeScanningAlertFixed.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookCodeScanningAlertFixed
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookCodeScanningAlertFixedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookCodeScanningAlertFixedAction Action { get; set; } = global::G.WebhookCodeScanningAlertFixedAction.Fixed;
+        public global::G.WebhookCodeScanningAlertFixedAction Action { get; set; }
 
         /// <summary>
         /// The code scanning alert involved in the event.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCodeScanningAlertFixedAlert.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCodeScanningAlertFixedAlert.g.verified.cs
index 00d25d0cfc..fe64aff63e 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCodeScanningAlertFixedAlert.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCodeScanningAlertFixedAlert.g.verified.cs
@@ -76,8 +76,7 @@ public sealed partial class WebhookCodeScanningAlertFixedAlert
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("state")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookCodeScanningAlertFixedAlertStateJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookCodeScanningAlertFixedAlertState State { get; set; } = global::G.WebhookCodeScanningAlertFixedAlertState.Fixed;
+        public global::G.WebhookCodeScanningAlertFixedAlertState State { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCodeScanningAlertReopened.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCodeScanningAlertReopened.g.verified.cs
index 15db9fcd94..61ddce6a32 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCodeScanningAlertReopened.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCodeScanningAlertReopened.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookCodeScanningAlertReopened
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookCodeScanningAlertReopenedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookCodeScanningAlertReopenedAction Action { get; set; } = global::G.WebhookCodeScanningAlertReopenedAction.Reopened;
+        public global::G.WebhookCodeScanningAlertReopenedAction Action { get; set; }
 
         /// <summary>
         /// The code scanning alert involved in the event.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCodeScanningAlertReopenedByUser.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCodeScanningAlertReopenedByUser.g.verified.cs
index 9adc8b4feb..19b77d6420 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCodeScanningAlertReopenedByUser.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCodeScanningAlertReopenedByUser.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookCodeScanningAlertReopenedByUser
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookCodeScanningAlertReopenedByUserActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookCodeScanningAlertReopenedByUserAction Action { get; set; } = global::G.WebhookCodeScanningAlertReopenedByUserAction.ReopenedByUser;
+        public global::G.WebhookCodeScanningAlertReopenedByUserAction Action { get; set; }
 
         /// <summary>
         /// The code scanning alert involved in the event.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCommitCommentCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCommitCommentCreated.g.verified.cs
index 087e04c1fd..db5eb366db 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCommitCommentCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCommitCommentCreated.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookCommitCommentCreated
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookCommitCommentCreatedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookCommitCommentCreatedAction Action { get; set; } = global::G.WebhookCommitCommentCreatedAction.Created;
+        public global::G.WebhookCommitCommentCreatedAction Action { get; set; }
 
         /// <summary>
         /// The [commit comment](https://docs.github.com/rest/commits/comments#get-a-commit-comment) resource.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCustomPropertyCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCustomPropertyCreated.g.verified.cs
index 1f4a7d7dac..2d32aaba47 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCustomPropertyCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCustomPropertyCreated.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookCustomPropertyCreated
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookCustomPropertyCreatedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookCustomPropertyCreatedAction Action { get; set; } = global::G.WebhookCustomPropertyCreatedAction.Created;
+        public global::G.WebhookCustomPropertyCreatedAction Action { get; set; }
 
         /// <summary>
         /// Custom property defined on an organization
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCustomPropertyDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCustomPropertyDeleted.g.verified.cs
index c630d8b2e2..80b347ad76 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCustomPropertyDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCustomPropertyDeleted.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookCustomPropertyDeleted
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookCustomPropertyDeletedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookCustomPropertyDeletedAction Action { get; set; } = global::G.WebhookCustomPropertyDeletedAction.Deleted;
+        public global::G.WebhookCustomPropertyDeletedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCustomPropertyUpdated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCustomPropertyUpdated.g.verified.cs
index 5ddf072256..c5fb730c2b 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCustomPropertyUpdated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCustomPropertyUpdated.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookCustomPropertyUpdated
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookCustomPropertyUpdatedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookCustomPropertyUpdatedAction Action { get; set; } = global::G.WebhookCustomPropertyUpdatedAction.Updated;
+        public global::G.WebhookCustomPropertyUpdatedAction Action { get; set; }
 
         /// <summary>
         /// Custom property defined on an organization
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCustomPropertyValuesUpdated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCustomPropertyValuesUpdated.g.verified.cs
index f21cbe9b8a..466c920970 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCustomPropertyValuesUpdated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookCustomPropertyValuesUpdated.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookCustomPropertyValuesUpdated
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookCustomPropertyValuesUpdatedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookCustomPropertyValuesUpdatedAction Action { get; set; } = global::G.WebhookCustomPropertyValuesUpdatedAction.Updated;
+        public global::G.WebhookCustomPropertyValuesUpdatedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDependabotAlertAutoDismissed.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDependabotAlertAutoDismissed.g.verified.cs
index bcdade4238..36860fe777 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDependabotAlertAutoDismissed.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDependabotAlertAutoDismissed.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookDependabotAlertAutoDismissed
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookDependabotAlertAutoDismissedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookDependabotAlertAutoDismissedAction Action { get; set; } = global::G.WebhookDependabotAlertAutoDismissedAction.AutoDismissed;
+        public global::G.WebhookDependabotAlertAutoDismissedAction Action { get; set; }
 
         /// <summary>
         /// A Dependabot alert.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDependabotAlertAutoReopened.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDependabotAlertAutoReopened.g.verified.cs
index 8c01228fd7..f1a087c924 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDependabotAlertAutoReopened.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDependabotAlertAutoReopened.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookDependabotAlertAutoReopened
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookDependabotAlertAutoReopenedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookDependabotAlertAutoReopenedAction Action { get; set; } = global::G.WebhookDependabotAlertAutoReopenedAction.AutoReopened;
+        public global::G.WebhookDependabotAlertAutoReopenedAction Action { get; set; }
 
         /// <summary>
         /// A Dependabot alert.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDependabotAlertCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDependabotAlertCreated.g.verified.cs
index eab520e84c..531a691b26 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDependabotAlertCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDependabotAlertCreated.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookDependabotAlertCreated
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookDependabotAlertCreatedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookDependabotAlertCreatedAction Action { get; set; } = global::G.WebhookDependabotAlertCreatedAction.Created;
+        public global::G.WebhookDependabotAlertCreatedAction Action { get; set; }
 
         /// <summary>
         /// A Dependabot alert.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDependabotAlertDismissed.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDependabotAlertDismissed.g.verified.cs
index bd7360b5a8..5339022cc1 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDependabotAlertDismissed.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDependabotAlertDismissed.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookDependabotAlertDismissed
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookDependabotAlertDismissedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookDependabotAlertDismissedAction Action { get; set; } = global::G.WebhookDependabotAlertDismissedAction.Dismissed;
+        public global::G.WebhookDependabotAlertDismissedAction Action { get; set; }
 
         /// <summary>
         /// A Dependabot alert.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDependabotAlertFixed.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDependabotAlertFixed.g.verified.cs
index 5b78397eaf..d2f2f5c4f1 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDependabotAlertFixed.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDependabotAlertFixed.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookDependabotAlertFixed
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookDependabotAlertFixedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookDependabotAlertFixedAction Action { get; set; } = global::G.WebhookDependabotAlertFixedAction.Fixed;
+        public global::G.WebhookDependabotAlertFixedAction Action { get; set; }
 
         /// <summary>
         /// A Dependabot alert.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDependabotAlertReintroduced.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDependabotAlertReintroduced.g.verified.cs
index 948ba5c126..f92df8d52c 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDependabotAlertReintroduced.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDependabotAlertReintroduced.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookDependabotAlertReintroduced
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookDependabotAlertReintroducedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookDependabotAlertReintroducedAction Action { get; set; } = global::G.WebhookDependabotAlertReintroducedAction.Reintroduced;
+        public global::G.WebhookDependabotAlertReintroducedAction Action { get; set; }
 
         /// <summary>
         /// A Dependabot alert.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDependabotAlertReopened.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDependabotAlertReopened.g.verified.cs
index 3590e92af3..e04e511544 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDependabotAlertReopened.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDependabotAlertReopened.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookDependabotAlertReopened
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookDependabotAlertReopenedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookDependabotAlertReopenedAction Action { get; set; } = global::G.WebhookDependabotAlertReopenedAction.Reopened;
+        public global::G.WebhookDependabotAlertReopenedAction Action { get; set; }
 
         /// <summary>
         /// A Dependabot alert.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDeployKeyCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDeployKeyCreated.g.verified.cs
index ac867c7c6a..7ca6a18352 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDeployKeyCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDeployKeyCreated.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookDeployKeyCreated
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookDeployKeyCreatedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookDeployKeyCreatedAction Action { get; set; } = global::G.WebhookDeployKeyCreatedAction.Created;
+        public global::G.WebhookDeployKeyCreatedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDeployKeyDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDeployKeyDeleted.g.verified.cs
index 680755e834..7059357bcb 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDeployKeyDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDeployKeyDeleted.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookDeployKeyDeleted
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookDeployKeyDeletedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookDeployKeyDeletedAction Action { get; set; } = global::G.WebhookDeployKeyDeletedAction.Deleted;
+        public global::G.WebhookDeployKeyDeletedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDeploymentCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDeploymentCreated.g.verified.cs
index 41feb7a820..e9235c196e 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDeploymentCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDeploymentCreated.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookDeploymentCreated
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookDeploymentCreatedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookDeploymentCreatedAction Action { get; set; } = global::G.WebhookDeploymentCreatedAction.Created;
+        public global::G.WebhookDeploymentCreatedAction Action { get; set; }
 
         /// <summary>
         /// The [deployment](https://docs.github.com/rest/deployments/deployments#list-deployments).
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDeploymentReviewApproved.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDeploymentReviewApproved.g.verified.cs
index c5e685cb57..40ada74db0 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDeploymentReviewApproved.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDeploymentReviewApproved.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookDeploymentReviewApproved
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookDeploymentReviewApprovedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookDeploymentReviewApprovedAction Action { get; set; } = global::G.WebhookDeploymentReviewApprovedAction.Approved;
+        public global::G.WebhookDeploymentReviewApprovedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDeploymentReviewRejected.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDeploymentReviewRejected.g.verified.cs
index 6d6844d725..19b702cc0a 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDeploymentReviewRejected.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDeploymentReviewRejected.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookDeploymentReviewRejected
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookDeploymentReviewRejectedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookDeploymentReviewRejectedAction Action { get; set; } = global::G.WebhookDeploymentReviewRejectedAction.Rejected;
+        public global::G.WebhookDeploymentReviewRejectedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDeploymentReviewRequested.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDeploymentReviewRequested.g.verified.cs
index b80facfa62..38ad1f1fc6 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDeploymentReviewRequested.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDeploymentReviewRequested.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookDeploymentReviewRequested
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookDeploymentReviewRequestedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookDeploymentReviewRequestedAction Action { get; set; } = global::G.WebhookDeploymentReviewRequestedAction.Requested;
+        public global::G.WebhookDeploymentReviewRequestedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDeploymentStatusCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDeploymentStatusCreated.g.verified.cs
index f86dc3f20d..df0d13332b 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDeploymentStatusCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDeploymentStatusCreated.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookDeploymentStatusCreated
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookDeploymentStatusCreatedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookDeploymentStatusCreatedAction Action { get; set; } = global::G.WebhookDeploymentStatusCreatedAction.Created;
+        public global::G.WebhookDeploymentStatusCreatedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionAnswered.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionAnswered.g.verified.cs
index 1b3f73e8b1..93a51d2420 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionAnswered.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionAnswered.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookDiscussionAnswered
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookDiscussionAnsweredActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookDiscussionAnsweredAction Action { get; set; } = global::G.WebhookDiscussionAnsweredAction.Answered;
+        public global::G.WebhookDiscussionAnsweredAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionCategoryChanged.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionCategoryChanged.g.verified.cs
index fc1f0699c0..ade59b5e37 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionCategoryChanged.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionCategoryChanged.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookDiscussionCategoryChanged
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookDiscussionCategoryChangedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookDiscussionCategoryChangedAction Action { get; set; } = global::G.WebhookDiscussionCategoryChangedAction.CategoryChanged;
+        public global::G.WebhookDiscussionCategoryChangedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionClosed.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionClosed.g.verified.cs
index 870a0d9607..a6ee1783ba 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionClosed.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionClosed.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookDiscussionClosed
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookDiscussionClosedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookDiscussionClosedAction Action { get; set; } = global::G.WebhookDiscussionClosedAction.Closed;
+        public global::G.WebhookDiscussionClosedAction Action { get; set; }
 
         /// <summary>
         /// A Discussion in a repository.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionCommentCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionCommentCreated.g.verified.cs
index d4786e76ef..9756b928bb 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionCommentCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionCommentCreated.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookDiscussionCommentCreated
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookDiscussionCommentCreatedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookDiscussionCommentCreatedAction Action { get; set; } = global::G.WebhookDiscussionCommentCreatedAction.Created;
+        public global::G.WebhookDiscussionCommentCreatedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionCommentDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionCommentDeleted.g.verified.cs
index e2f122b12e..4599353cf5 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionCommentDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionCommentDeleted.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookDiscussionCommentDeleted
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookDiscussionCommentDeletedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookDiscussionCommentDeletedAction Action { get; set; } = global::G.WebhookDiscussionCommentDeletedAction.Deleted;
+        public global::G.WebhookDiscussionCommentDeletedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionCommentEdited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionCommentEdited.g.verified.cs
index 415a3cc472..b95d142d62 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionCommentEdited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionCommentEdited.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookDiscussionCommentEdited
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookDiscussionCommentEditedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookDiscussionCommentEditedAction Action { get; set; } = global::G.WebhookDiscussionCommentEditedAction.Edited;
+        public global::G.WebhookDiscussionCommentEditedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionCreated.g.verified.cs
index 9c039055fa..fc7f75edbb 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionCreated.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookDiscussionCreated
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookDiscussionCreatedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookDiscussionCreatedAction Action { get; set; } = global::G.WebhookDiscussionCreatedAction.Created;
+        public global::G.WebhookDiscussionCreatedAction Action { get; set; }
 
         /// <summary>
         /// A Discussion in a repository.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionDeleted.g.verified.cs
index 44ad76dceb..be3be765fe 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionDeleted.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookDiscussionDeleted
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookDiscussionDeletedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookDiscussionDeletedAction Action { get; set; } = global::G.WebhookDiscussionDeletedAction.Deleted;
+        public global::G.WebhookDiscussionDeletedAction Action { get; set; }
 
         /// <summary>
         /// A Discussion in a repository.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionEdited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionEdited.g.verified.cs
index b862a630dd..8559b1a5c8 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionEdited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionEdited.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookDiscussionEdited
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookDiscussionEditedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookDiscussionEditedAction Action { get; set; } = global::G.WebhookDiscussionEditedAction.Edited;
+        public global::G.WebhookDiscussionEditedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionLabeled.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionLabeled.g.verified.cs
index 92edd6289f..5b2ccd3ec5 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionLabeled.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionLabeled.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookDiscussionLabeled
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookDiscussionLabeledActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookDiscussionLabeledAction Action { get; set; } = global::G.WebhookDiscussionLabeledAction.Labeled;
+        public global::G.WebhookDiscussionLabeledAction Action { get; set; }
 
         /// <summary>
         /// A Discussion in a repository.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionLocked.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionLocked.g.verified.cs
index f26515c7ac..8841ce9e88 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionLocked.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionLocked.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookDiscussionLocked
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookDiscussionLockedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookDiscussionLockedAction Action { get; set; } = global::G.WebhookDiscussionLockedAction.Locked;
+        public global::G.WebhookDiscussionLockedAction Action { get; set; }
 
         /// <summary>
         /// A Discussion in a repository.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionPinned.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionPinned.g.verified.cs
index 0420f90bea..cf6764519f 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionPinned.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionPinned.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookDiscussionPinned
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookDiscussionPinnedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookDiscussionPinnedAction Action { get; set; } = global::G.WebhookDiscussionPinnedAction.Pinned;
+        public global::G.WebhookDiscussionPinnedAction Action { get; set; }
 
         /// <summary>
         /// A Discussion in a repository.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionReopened.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionReopened.g.verified.cs
index 6108cf9ec6..fda50eb1aa 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionReopened.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionReopened.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookDiscussionReopened
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookDiscussionReopenedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookDiscussionReopenedAction Action { get; set; } = global::G.WebhookDiscussionReopenedAction.Reopened;
+        public global::G.WebhookDiscussionReopenedAction Action { get; set; }
 
         /// <summary>
         /// A Discussion in a repository.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionTransferred.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionTransferred.g.verified.cs
index 14de63a0ea..ce992cba5d 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionTransferred.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionTransferred.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookDiscussionTransferred
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookDiscussionTransferredActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookDiscussionTransferredAction Action { get; set; } = global::G.WebhookDiscussionTransferredAction.Transferred;
+        public global::G.WebhookDiscussionTransferredAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionUnanswered.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionUnanswered.g.verified.cs
index 7b73b41594..9b4289e1e6 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionUnanswered.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionUnanswered.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookDiscussionUnanswered
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookDiscussionUnansweredActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookDiscussionUnansweredAction Action { get; set; } = global::G.WebhookDiscussionUnansweredAction.Unanswered;
+        public global::G.WebhookDiscussionUnansweredAction Action { get; set; }
 
         /// <summary>
         /// A Discussion in a repository.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionUnlabeled.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionUnlabeled.g.verified.cs
index ca2f21c467..6d59854790 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionUnlabeled.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionUnlabeled.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookDiscussionUnlabeled
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookDiscussionUnlabeledActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookDiscussionUnlabeledAction Action { get; set; } = global::G.WebhookDiscussionUnlabeledAction.Unlabeled;
+        public global::G.WebhookDiscussionUnlabeledAction Action { get; set; }
 
         /// <summary>
         /// A Discussion in a repository.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionUnlocked.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionUnlocked.g.verified.cs
index ce7c5e77f5..2533ca39b0 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionUnlocked.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionUnlocked.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookDiscussionUnlocked
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookDiscussionUnlockedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookDiscussionUnlockedAction Action { get; set; } = global::G.WebhookDiscussionUnlockedAction.Unlocked;
+        public global::G.WebhookDiscussionUnlockedAction Action { get; set; }
 
         /// <summary>
         /// A Discussion in a repository.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionUnpinned.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionUnpinned.g.verified.cs
index 52fcd3fee7..bc91c5dbe0 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionUnpinned.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookDiscussionUnpinned.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookDiscussionUnpinned
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookDiscussionUnpinnedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookDiscussionUnpinnedAction Action { get; set; } = global::G.WebhookDiscussionUnpinnedAction.Unpinned;
+        public global::G.WebhookDiscussionUnpinnedAction Action { get; set; }
 
         /// <summary>
         /// A Discussion in a repository.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookGithubAppAuthorizationRevoked.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookGithubAppAuthorizationRevoked.g.verified.cs
index 4e4a6028c4..92789f66a2 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookGithubAppAuthorizationRevoked.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookGithubAppAuthorizationRevoked.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookGithubAppAuthorizationRevoked
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookGithubAppAuthorizationRevokedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookGithubAppAuthorizationRevokedAction Action { get; set; } = global::G.WebhookGithubAppAuthorizationRevokedAction.Revoked;
+        public global::G.WebhookGithubAppAuthorizationRevokedAction Action { get; set; }
 
         /// <summary>
         /// The GitHub user that triggered the event. This property is included in every webhook payload.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookInstallationCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookInstallationCreated.g.verified.cs
index 74ed9d3af2..eb08528ff2 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookInstallationCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookInstallationCreated.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookInstallationCreated
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookInstallationCreatedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookInstallationCreatedAction Action { get; set; } = global::G.WebhookInstallationCreatedAction.Created;
+        public global::G.WebhookInstallationCreatedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookInstallationDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookInstallationDeleted.g.verified.cs
index abd9353ebc..f29fc6ccae 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookInstallationDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookInstallationDeleted.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookInstallationDeleted
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookInstallationDeletedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookInstallationDeletedAction Action { get; set; } = global::G.WebhookInstallationDeletedAction.Deleted;
+        public global::G.WebhookInstallationDeletedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookInstallationNewPermissionsAccepted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookInstallationNewPermissionsAccepted.g.verified.cs
index 24d78de8b1..0eebbfdaed 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookInstallationNewPermissionsAccepted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookInstallationNewPermissionsAccepted.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookInstallationNewPermissionsAccepted
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookInstallationNewPermissionsAcceptedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookInstallationNewPermissionsAcceptedAction Action { get; set; } = global::G.WebhookInstallationNewPermissionsAcceptedAction.NewPermissionsAccepted;
+        public global::G.WebhookInstallationNewPermissionsAcceptedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookInstallationRepositoriesAdded.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookInstallationRepositoriesAdded.g.verified.cs
index 6f2a19564d..fbb5d8e784 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookInstallationRepositoriesAdded.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookInstallationRepositoriesAdded.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookInstallationRepositoriesAdded
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookInstallationRepositoriesAddedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookInstallationRepositoriesAddedAction Action { get; set; } = global::G.WebhookInstallationRepositoriesAddedAction.Added;
+        public global::G.WebhookInstallationRepositoriesAddedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookInstallationRepositoriesRemoved.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookInstallationRepositoriesRemoved.g.verified.cs
index 5ce48d8538..ba0fe05cba 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookInstallationRepositoriesRemoved.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookInstallationRepositoriesRemoved.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookInstallationRepositoriesRemoved
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookInstallationRepositoriesRemovedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookInstallationRepositoriesRemovedAction Action { get; set; } = global::G.WebhookInstallationRepositoriesRemovedAction.Removed;
+        public global::G.WebhookInstallationRepositoriesRemovedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookInstallationSuspend.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookInstallationSuspend.g.verified.cs
index 1883872c06..01415e8edc 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookInstallationSuspend.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookInstallationSuspend.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookInstallationSuspend
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookInstallationSuspendActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookInstallationSuspendAction Action { get; set; } = global::G.WebhookInstallationSuspendAction.Suspend;
+        public global::G.WebhookInstallationSuspendAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookInstallationTargetRenamed.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookInstallationTargetRenamed.g.verified.cs
index 89133b5ffe..b48976559f 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookInstallationTargetRenamed.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookInstallationTargetRenamed.g.verified.cs
@@ -21,8 +21,7 @@ public sealed partial class WebhookInstallationTargetRenamed
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookInstallationTargetRenamedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookInstallationTargetRenamedAction Action { get; set; } = global::G.WebhookInstallationTargetRenamedAction.Renamed;
+        public global::G.WebhookInstallationTargetRenamedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookInstallationUnsuspend.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookInstallationUnsuspend.g.verified.cs
index 2230cb0fd7..f16f8c6686 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookInstallationUnsuspend.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookInstallationUnsuspend.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookInstallationUnsuspend
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookInstallationUnsuspendActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookInstallationUnsuspendAction Action { get; set; } = global::G.WebhookInstallationUnsuspendAction.Unsuspend;
+        public global::G.WebhookInstallationUnsuspendAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssueCommentCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssueCommentCreated.g.verified.cs
index 79774d9cd4..42f5770c3a 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssueCommentCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssueCommentCreated.g.verified.cs
@@ -16,8 +16,7 @@ public sealed partial class WebhookIssueCommentCreated
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookIssueCommentCreatedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookIssueCommentCreatedAction Action { get; set; } = global::G.WebhookIssueCommentCreatedAction.Created;
+        public global::G.WebhookIssueCommentCreatedAction Action { get; set; }
 
         /// <summary>
         /// The [comment](https://docs.github.com/rest/issues/comments#get-an-issue-comment) itself.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssueCommentDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssueCommentDeleted.g.verified.cs
index 1bdad16702..da75610f23 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssueCommentDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssueCommentDeleted.g.verified.cs
@@ -16,8 +16,7 @@ public sealed partial class WebhookIssueCommentDeleted
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookIssueCommentDeletedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookIssueCommentDeletedAction Action { get; set; } = global::G.WebhookIssueCommentDeletedAction.Deleted;
+        public global::G.WebhookIssueCommentDeletedAction Action { get; set; }
 
         /// <summary>
         /// The [comment](https://docs.github.com/rest/issues/comments#get-an-issue-comment) itself.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssueCommentEdited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssueCommentEdited.g.verified.cs
index de13e8534e..9ebc154848 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssueCommentEdited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssueCommentEdited.g.verified.cs
@@ -16,8 +16,7 @@ public sealed partial class WebhookIssueCommentEdited
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookIssueCommentEditedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookIssueCommentEditedAction Action { get; set; } = global::G.WebhookIssueCommentEditedAction.Edited;
+        public global::G.WebhookIssueCommentEditedAction Action { get; set; }
 
         /// <summary>
         /// The changes to the comment.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesAssigned.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesAssigned.g.verified.cs
index 218dfa0f40..7d0d62659d 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesAssigned.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesAssigned.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookIssuesAssigned
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookIssuesAssignedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookIssuesAssignedAction Action { get; set; } = global::G.WebhookIssuesAssignedAction.Assigned;
+        public global::G.WebhookIssuesAssignedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesClosed.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesClosed.g.verified.cs
index 055bdddc92..33680c5313 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesClosed.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesClosed.g.verified.cs
@@ -16,8 +16,7 @@ public sealed partial class WebhookIssuesClosed
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookIssuesClosedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookIssuesClosedAction Action { get; set; } = global::G.WebhookIssuesClosedAction.Closed;
+        public global::G.WebhookIssuesClosedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesDeleted.g.verified.cs
index 480a5ddc20..f01767932e 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesDeleted.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookIssuesDeleted
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookIssuesDeletedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookIssuesDeletedAction Action { get; set; } = global::G.WebhookIssuesDeletedAction.Deleted;
+        public global::G.WebhookIssuesDeletedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesDemilestoned.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesDemilestoned.g.verified.cs
index d412faaa27..62a829e652 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesDemilestoned.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesDemilestoned.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookIssuesDemilestoned
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookIssuesDemilestonedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookIssuesDemilestonedAction Action { get; set; } = global::G.WebhookIssuesDemilestonedAction.Demilestoned;
+        public global::G.WebhookIssuesDemilestonedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesEdited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesEdited.g.verified.cs
index 33e7384b67..7c80498a41 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesEdited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesEdited.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookIssuesEdited
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookIssuesEditedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookIssuesEditedAction Action { get; set; } = global::G.WebhookIssuesEditedAction.Edited;
+        public global::G.WebhookIssuesEditedAction Action { get; set; }
 
         /// <summary>
         /// The changes to the issue.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesLabeled.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesLabeled.g.verified.cs
index 7772b1af13..9d5a3c72e3 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesLabeled.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesLabeled.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookIssuesLabeled
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookIssuesLabeledActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookIssuesLabeledAction Action { get; set; } = global::G.WebhookIssuesLabeledAction.Labeled;
+        public global::G.WebhookIssuesLabeledAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesLocked.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesLocked.g.verified.cs
index e0992d1b3a..3980db6d68 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesLocked.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesLocked.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookIssuesLocked
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookIssuesLockedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookIssuesLockedAction Action { get; set; } = global::G.WebhookIssuesLockedAction.Locked;
+        public global::G.WebhookIssuesLockedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesMilestoned.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesMilestoned.g.verified.cs
index c2e94eea23..a7a4eb5abe 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesMilestoned.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesMilestoned.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookIssuesMilestoned
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookIssuesMilestonedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookIssuesMilestonedAction Action { get; set; } = global::G.WebhookIssuesMilestonedAction.Milestoned;
+        public global::G.WebhookIssuesMilestonedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesOpened.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesOpened.g.verified.cs
index 8cf5eb9148..e11bd7be4e 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesOpened.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesOpened.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookIssuesOpened
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookIssuesOpenedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookIssuesOpenedAction Action { get; set; } = global::G.WebhookIssuesOpenedAction.Opened;
+        public global::G.WebhookIssuesOpenedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesPinned.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesPinned.g.verified.cs
index 5bbc4b9681..ae5bc01d9e 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesPinned.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesPinned.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookIssuesPinned
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookIssuesPinnedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookIssuesPinnedAction Action { get; set; } = global::G.WebhookIssuesPinnedAction.Pinned;
+        public global::G.WebhookIssuesPinnedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesReopened.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesReopened.g.verified.cs
index fd527743cd..85301e7664 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesReopened.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesReopened.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookIssuesReopened
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookIssuesReopenedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookIssuesReopenedAction Action { get; set; } = global::G.WebhookIssuesReopenedAction.Reopened;
+        public global::G.WebhookIssuesReopenedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesTransferred.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesTransferred.g.verified.cs
index 6c775016e4..dced7b1170 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesTransferred.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesTransferred.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookIssuesTransferred
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookIssuesTransferredActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookIssuesTransferredAction Action { get; set; } = global::G.WebhookIssuesTransferredAction.Transferred;
+        public global::G.WebhookIssuesTransferredAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesUnassigned.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesUnassigned.g.verified.cs
index 2d4a7c1504..87990b160c 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesUnassigned.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesUnassigned.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookIssuesUnassigned
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookIssuesUnassignedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookIssuesUnassignedAction Action { get; set; } = global::G.WebhookIssuesUnassignedAction.Unassigned;
+        public global::G.WebhookIssuesUnassignedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesUnlabeled.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesUnlabeled.g.verified.cs
index 29c5c5df3d..5596bd4545 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesUnlabeled.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesUnlabeled.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookIssuesUnlabeled
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookIssuesUnlabeledActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookIssuesUnlabeledAction Action { get; set; } = global::G.WebhookIssuesUnlabeledAction.Unlabeled;
+        public global::G.WebhookIssuesUnlabeledAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesUnlocked.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesUnlocked.g.verified.cs
index 661341215a..7b42b00fcc 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesUnlocked.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesUnlocked.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookIssuesUnlocked
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookIssuesUnlockedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookIssuesUnlockedAction Action { get; set; } = global::G.WebhookIssuesUnlockedAction.Unlocked;
+        public global::G.WebhookIssuesUnlockedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesUnpinned.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesUnpinned.g.verified.cs
index fba61d19bc..ea8dfcd8f7 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesUnpinned.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookIssuesUnpinned.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookIssuesUnpinned
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookIssuesUnpinnedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookIssuesUnpinnedAction Action { get; set; } = global::G.WebhookIssuesUnpinnedAction.Unpinned;
+        public global::G.WebhookIssuesUnpinnedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookLabelCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookLabelCreated.g.verified.cs
index 528f023e09..f2d8974d0d 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookLabelCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookLabelCreated.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookLabelCreated
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookLabelCreatedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookLabelCreatedAction Action { get; set; } = global::G.WebhookLabelCreatedAction.Created;
+        public global::G.WebhookLabelCreatedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookLabelDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookLabelDeleted.g.verified.cs
index 07d5cac94c..2730301f79 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookLabelDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookLabelDeleted.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookLabelDeleted
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookLabelDeletedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookLabelDeletedAction Action { get; set; } = global::G.WebhookLabelDeletedAction.Deleted;
+        public global::G.WebhookLabelDeletedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookLabelEdited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookLabelEdited.g.verified.cs
index 77219c9ae2..831461793b 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookLabelEdited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookLabelEdited.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookLabelEdited
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookLabelEditedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookLabelEditedAction Action { get; set; } = global::G.WebhookLabelEditedAction.Edited;
+        public global::G.WebhookLabelEditedAction Action { get; set; }
 
         /// <summary>
         /// The changes to the label if the action was `edited`.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMarketplacePurchaseCancelled.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMarketplacePurchaseCancelled.g.verified.cs
index 07df8f01c8..7e55a3f26a 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMarketplacePurchaseCancelled.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMarketplacePurchaseCancelled.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookMarketplacePurchaseCancelled
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookMarketplacePurchaseCancelledActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookMarketplacePurchaseCancelledAction Action { get; set; } = global::G.WebhookMarketplacePurchaseCancelledAction.Cancelled;
+        public global::G.WebhookMarketplacePurchaseCancelledAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMarketplacePurchaseChanged.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMarketplacePurchaseChanged.g.verified.cs
index b15bfa9343..4e7a1e78a1 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMarketplacePurchaseChanged.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMarketplacePurchaseChanged.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookMarketplacePurchaseChanged
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookMarketplacePurchaseChangedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookMarketplacePurchaseChangedAction Action { get; set; } = global::G.WebhookMarketplacePurchaseChangedAction.Changed;
+        public global::G.WebhookMarketplacePurchaseChangedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMarketplacePurchasePendingChange.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMarketplacePurchasePendingChange.g.verified.cs
index 4e6d34084f..24cccc004d 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMarketplacePurchasePendingChange.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMarketplacePurchasePendingChange.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookMarketplacePurchasePendingChange
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookMarketplacePurchasePendingChangeActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookMarketplacePurchasePendingChangeAction Action { get; set; } = global::G.WebhookMarketplacePurchasePendingChangeAction.PendingChange;
+        public global::G.WebhookMarketplacePurchasePendingChangeAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMarketplacePurchasePendingChangeCancelled.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMarketplacePurchasePendingChangeCancelled.g.verified.cs
index 3de04c1683..bd13249218 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMarketplacePurchasePendingChangeCancelled.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMarketplacePurchasePendingChangeCancelled.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookMarketplacePurchasePendingChangeCancelled
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookMarketplacePurchasePendingChangeCancelledActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookMarketplacePurchasePendingChangeCancelledAction Action { get; set; } = global::G.WebhookMarketplacePurchasePendingChangeCancelledAction.PendingChangeCancelled;
+        public global::G.WebhookMarketplacePurchasePendingChangeCancelledAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMarketplacePurchasePurchased.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMarketplacePurchasePurchased.g.verified.cs
index 17def8db8b..df8f00fbbe 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMarketplacePurchasePurchased.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMarketplacePurchasePurchased.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookMarketplacePurchasePurchased
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookMarketplacePurchasePurchasedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookMarketplacePurchasePurchasedAction Action { get; set; } = global::G.WebhookMarketplacePurchasePurchasedAction.Purchased;
+        public global::G.WebhookMarketplacePurchasePurchasedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMemberAdded.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMemberAdded.g.verified.cs
index d46c26df15..a8df308f73 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMemberAdded.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMemberAdded.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookMemberAdded
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookMemberAddedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookMemberAddedAction Action { get; set; } = global::G.WebhookMemberAddedAction.Added;
+        public global::G.WebhookMemberAddedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMemberEdited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMemberEdited.g.verified.cs
index 33b99de705..3656f94b0c 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMemberEdited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMemberEdited.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookMemberEdited
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookMemberEditedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookMemberEditedAction Action { get; set; } = global::G.WebhookMemberEditedAction.Edited;
+        public global::G.WebhookMemberEditedAction Action { get; set; }
 
         /// <summary>
         /// The changes to the collaborator permissions
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMemberRemoved.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMemberRemoved.g.verified.cs
index 66ec8d7811..f3559359e5 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMemberRemoved.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMemberRemoved.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookMemberRemoved
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookMemberRemovedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookMemberRemovedAction Action { get; set; } = global::G.WebhookMemberRemovedAction.Removed;
+        public global::G.WebhookMemberRemovedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMembershipAdded.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMembershipAdded.g.verified.cs
index 63ff46b922..be2d5fc51c 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMembershipAdded.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMembershipAdded.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookMembershipAdded
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookMembershipAddedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookMembershipAddedAction Action { get; set; } = global::G.WebhookMembershipAddedAction.Added;
+        public global::G.WebhookMembershipAddedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
@@ -60,8 +59,7 @@ public sealed partial class WebhookMembershipAdded
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("scope")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookMembershipAddedScopeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookMembershipAddedScope Scope { get; set; } = global::G.WebhookMembershipAddedScope.Team;
+        public global::G.WebhookMembershipAddedScope Scope { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMembershipRemoved.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMembershipRemoved.g.verified.cs
index 2693cf5128..79879ce207 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMembershipRemoved.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMembershipRemoved.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookMembershipRemoved
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookMembershipRemovedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookMembershipRemovedAction Action { get; set; } = global::G.WebhookMembershipRemovedAction.Removed;
+        public global::G.WebhookMembershipRemovedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMergeGroupChecksRequested.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMergeGroupChecksRequested.g.verified.cs
index 0f329f5340..713b49925f 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMergeGroupChecksRequested.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMergeGroupChecksRequested.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookMergeGroupChecksRequested
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookMergeGroupChecksRequestedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookMergeGroupChecksRequestedAction Action { get; set; } = global::G.WebhookMergeGroupChecksRequestedAction.ChecksRequested;
+        public global::G.WebhookMergeGroupChecksRequestedAction Action { get; set; }
 
         /// <summary>
         /// The GitHub App installation. Webhook payloads contain the `installation` property when the event is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMergeGroupDestroyed.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMergeGroupDestroyed.g.verified.cs
index 98cc64b281..4edc589a11 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMergeGroupDestroyed.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMergeGroupDestroyed.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookMergeGroupDestroyed
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookMergeGroupDestroyedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookMergeGroupDestroyedAction Action { get; set; } = global::G.WebhookMergeGroupDestroyedAction.Destroyed;
+        public global::G.WebhookMergeGroupDestroyedAction Action { get; set; }
 
         /// <summary>
         /// Explains why the merge group is being destroyed. The group could have been merged, removed from the queue (dequeued), or invalidated by an earlier queue entry being dequeued (invalidated).
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMetaDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMetaDeleted.g.verified.cs
index d245c9ba93..4c65575bd0 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMetaDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMetaDeleted.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookMetaDeleted
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookMetaDeletedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookMetaDeletedAction Action { get; set; } = global::G.WebhookMetaDeletedAction.Deleted;
+        public global::G.WebhookMetaDeletedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMilestoneClosed.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMilestoneClosed.g.verified.cs
index 2f546589b2..2565219463 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMilestoneClosed.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMilestoneClosed.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookMilestoneClosed
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookMilestoneClosedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookMilestoneClosedAction Action { get; set; } = global::G.WebhookMilestoneClosedAction.Closed;
+        public global::G.WebhookMilestoneClosedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMilestoneCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMilestoneCreated.g.verified.cs
index 7ce185d53b..fae3cffe0b 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMilestoneCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMilestoneCreated.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookMilestoneCreated
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookMilestoneCreatedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookMilestoneCreatedAction Action { get; set; } = global::G.WebhookMilestoneCreatedAction.Created;
+        public global::G.WebhookMilestoneCreatedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMilestoneDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMilestoneDeleted.g.verified.cs
index bfb00f144b..ddaa9ff1ad 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMilestoneDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMilestoneDeleted.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookMilestoneDeleted
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookMilestoneDeletedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookMilestoneDeletedAction Action { get; set; } = global::G.WebhookMilestoneDeletedAction.Deleted;
+        public global::G.WebhookMilestoneDeletedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMilestoneEdited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMilestoneEdited.g.verified.cs
index d70d1463c7..c2bb736893 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMilestoneEdited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMilestoneEdited.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookMilestoneEdited
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookMilestoneEditedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookMilestoneEditedAction Action { get; set; } = global::G.WebhookMilestoneEditedAction.Edited;
+        public global::G.WebhookMilestoneEditedAction Action { get; set; }
 
         /// <summary>
         /// The changes to the milestone if the action was `edited`.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMilestoneOpened.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMilestoneOpened.g.verified.cs
index 786a6a4012..89f017dbfa 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMilestoneOpened.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookMilestoneOpened.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookMilestoneOpened
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookMilestoneOpenedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookMilestoneOpenedAction Action { get; set; } = global::G.WebhookMilestoneOpenedAction.Opened;
+        public global::G.WebhookMilestoneOpenedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookOrgBlockBlocked.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookOrgBlockBlocked.g.verified.cs
index e8c168073c..8b42d4339d 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookOrgBlockBlocked.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookOrgBlockBlocked.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookOrgBlockBlocked
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookOrgBlockBlockedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookOrgBlockBlockedAction Action { get; set; } = global::G.WebhookOrgBlockBlockedAction.Blocked;
+        public global::G.WebhookOrgBlockBlockedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookOrgBlockUnblocked.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookOrgBlockUnblocked.g.verified.cs
index 0bd6e5adf8..627a836bad 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookOrgBlockUnblocked.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookOrgBlockUnblocked.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookOrgBlockUnblocked
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookOrgBlockUnblockedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookOrgBlockUnblockedAction Action { get; set; } = global::G.WebhookOrgBlockUnblockedAction.Unblocked;
+        public global::G.WebhookOrgBlockUnblockedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookOrganizationDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookOrganizationDeleted.g.verified.cs
index 7387ec18be..38c325fc4d 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookOrganizationDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookOrganizationDeleted.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookOrganizationDeleted
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookOrganizationDeletedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookOrganizationDeletedAction Action { get; set; } = global::G.WebhookOrganizationDeletedAction.Deleted;
+        public global::G.WebhookOrganizationDeletedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookOrganizationMemberAdded.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookOrganizationMemberAdded.g.verified.cs
index 1859f5f4ad..1193880dba 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookOrganizationMemberAdded.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookOrganizationMemberAdded.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookOrganizationMemberAdded
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookOrganizationMemberAddedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookOrganizationMemberAddedAction Action { get; set; } = global::G.WebhookOrganizationMemberAddedAction.MemberAdded;
+        public global::G.WebhookOrganizationMemberAddedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookOrganizationMemberInvited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookOrganizationMemberInvited.g.verified.cs
index b2314ffc01..580c8bc279 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookOrganizationMemberInvited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookOrganizationMemberInvited.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookOrganizationMemberInvited
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookOrganizationMemberInvitedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookOrganizationMemberInvitedAction Action { get; set; } = global::G.WebhookOrganizationMemberInvitedAction.MemberInvited;
+        public global::G.WebhookOrganizationMemberInvitedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookOrganizationMemberRemoved.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookOrganizationMemberRemoved.g.verified.cs
index 49499dbdf5..45bec7f2aa 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookOrganizationMemberRemoved.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookOrganizationMemberRemoved.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookOrganizationMemberRemoved
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookOrganizationMemberRemovedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookOrganizationMemberRemovedAction Action { get; set; } = global::G.WebhookOrganizationMemberRemovedAction.MemberRemoved;
+        public global::G.WebhookOrganizationMemberRemovedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookOrganizationRenamed.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookOrganizationRenamed.g.verified.cs
index 836fb2b92b..a0f1429412 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookOrganizationRenamed.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookOrganizationRenamed.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookOrganizationRenamed
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookOrganizationRenamedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookOrganizationRenamedAction Action { get; set; } = global::G.WebhookOrganizationRenamedAction.Renamed;
+        public global::G.WebhookOrganizationRenamedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPackagePublished.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPackagePublished.g.verified.cs
index b1279d6013..a0ab42bba3 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPackagePublished.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPackagePublished.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookPackagePublished
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookPackagePublishedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookPackagePublishedAction Action { get; set; } = global::G.WebhookPackagePublishedAction.Published;
+        public global::G.WebhookPackagePublishedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPackageUpdated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPackageUpdated.g.verified.cs
index 176df64983..8ad94cd7db 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPackageUpdated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPackageUpdated.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookPackageUpdated
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookPackageUpdatedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookPackageUpdatedAction Action { get; set; } = global::G.WebhookPackageUpdatedAction.Updated;
+        public global::G.WebhookPackageUpdatedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPersonalAccessTokenRequestApproved.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPersonalAccessTokenRequestApproved.g.verified.cs
index ec887961b8..99b2b1622f 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPersonalAccessTokenRequestApproved.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPersonalAccessTokenRequestApproved.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookPersonalAccessTokenRequestApproved
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookPersonalAccessTokenRequestApprovedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookPersonalAccessTokenRequestApprovedAction Action { get; set; } = global::G.WebhookPersonalAccessTokenRequestApprovedAction.Approved;
+        public global::G.WebhookPersonalAccessTokenRequestApprovedAction Action { get; set; }
 
         /// <summary>
         /// Details of a Personal Access Token Request.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPersonalAccessTokenRequestCancelled.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPersonalAccessTokenRequestCancelled.g.verified.cs
index f750d99eec..6e9f2d656c 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPersonalAccessTokenRequestCancelled.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPersonalAccessTokenRequestCancelled.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookPersonalAccessTokenRequestCancelled
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookPersonalAccessTokenRequestCancelledActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookPersonalAccessTokenRequestCancelledAction Action { get; set; } = global::G.WebhookPersonalAccessTokenRequestCancelledAction.Cancelled;
+        public global::G.WebhookPersonalAccessTokenRequestCancelledAction Action { get; set; }
 
         /// <summary>
         /// Details of a Personal Access Token Request.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPersonalAccessTokenRequestCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPersonalAccessTokenRequestCreated.g.verified.cs
index baa5ab5069..658613dcd4 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPersonalAccessTokenRequestCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPersonalAccessTokenRequestCreated.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookPersonalAccessTokenRequestCreated
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookPersonalAccessTokenRequestCreatedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookPersonalAccessTokenRequestCreatedAction Action { get; set; } = global::G.WebhookPersonalAccessTokenRequestCreatedAction.Created;
+        public global::G.WebhookPersonalAccessTokenRequestCreatedAction Action { get; set; }
 
         /// <summary>
         /// Details of a Personal Access Token Request.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPersonalAccessTokenRequestDenied.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPersonalAccessTokenRequestDenied.g.verified.cs
index fd3fd35db9..7057c3c862 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPersonalAccessTokenRequestDenied.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPersonalAccessTokenRequestDenied.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookPersonalAccessTokenRequestDenied
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookPersonalAccessTokenRequestDeniedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookPersonalAccessTokenRequestDeniedAction Action { get; set; } = global::G.WebhookPersonalAccessTokenRequestDeniedAction.Denied;
+        public global::G.WebhookPersonalAccessTokenRequestDeniedAction Action { get; set; }
 
         /// <summary>
         /// Details of a Personal Access Token Request.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPingHook.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPingHook.g.verified.cs
index c01ea802f8..7dec7826c2 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPingHook.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPingHook.g.verified.cs
@@ -67,8 +67,7 @@ public sealed partial class WebhookPingHook
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("name")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookPingHookNameJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookPingHookName Name { get; set; } = global::G.WebhookPingHookName.Web;
+        public global::G.WebhookPingHookName Name { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectCardConverted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectCardConverted.g.verified.cs
index 7da6bb927b..4560c67921 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectCardConverted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectCardConverted.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookProjectCardConverted
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookProjectCardConvertedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookProjectCardConvertedAction Action { get; set; } = global::G.WebhookProjectCardConvertedAction.Converted;
+        public global::G.WebhookProjectCardConvertedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectCardCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectCardCreated.g.verified.cs
index 0d05bf1e1c..a2f0774e7d 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectCardCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectCardCreated.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookProjectCardCreated
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookProjectCardCreatedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookProjectCardCreatedAction Action { get; set; } = global::G.WebhookProjectCardCreatedAction.Created;
+        public global::G.WebhookProjectCardCreatedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectCardDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectCardDeleted.g.verified.cs
index 64d9ce87da..e509c2025a 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectCardDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectCardDeleted.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookProjectCardDeleted
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookProjectCardDeletedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookProjectCardDeletedAction Action { get; set; } = global::G.WebhookProjectCardDeletedAction.Deleted;
+        public global::G.WebhookProjectCardDeletedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectCardEdited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectCardEdited.g.verified.cs
index 845049cc07..0ad492d53c 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectCardEdited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectCardEdited.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookProjectCardEdited
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookProjectCardEditedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookProjectCardEditedAction Action { get; set; } = global::G.WebhookProjectCardEditedAction.Edited;
+        public global::G.WebhookProjectCardEditedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectCardMoved.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectCardMoved.g.verified.cs
index c87e3a4dbd..eec0d60af6 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectCardMoved.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectCardMoved.g.verified.cs
@@ -16,8 +16,7 @@ public sealed partial class WebhookProjectCardMoved
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookProjectCardMovedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookProjectCardMovedAction Action { get; set; } = global::G.WebhookProjectCardMovedAction.Moved;
+        public global::G.WebhookProjectCardMovedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectClosed.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectClosed.g.verified.cs
index 8e52cd76da..f8f0b3bfec 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectClosed.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectClosed.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookProjectClosed
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookProjectClosedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookProjectClosedAction Action { get; set; } = global::G.WebhookProjectClosedAction.Closed;
+        public global::G.WebhookProjectClosedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectColumnCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectColumnCreated.g.verified.cs
index a8b03a394d..6045a6ca3f 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectColumnCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectColumnCreated.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookProjectColumnCreated
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookProjectColumnCreatedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookProjectColumnCreatedAction Action { get; set; } = global::G.WebhookProjectColumnCreatedAction.Created;
+        public global::G.WebhookProjectColumnCreatedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectColumnDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectColumnDeleted.g.verified.cs
index 42f0a3c28c..213f8f407d 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectColumnDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectColumnDeleted.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookProjectColumnDeleted
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookProjectColumnDeletedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookProjectColumnDeletedAction Action { get; set; } = global::G.WebhookProjectColumnDeletedAction.Deleted;
+        public global::G.WebhookProjectColumnDeletedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectColumnEdited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectColumnEdited.g.verified.cs
index 0875a578a2..3058d849bb 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectColumnEdited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectColumnEdited.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookProjectColumnEdited
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookProjectColumnEditedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookProjectColumnEditedAction Action { get; set; } = global::G.WebhookProjectColumnEditedAction.Edited;
+        public global::G.WebhookProjectColumnEditedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectColumnMoved.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectColumnMoved.g.verified.cs
index 40c1fad5a5..cccdd5c694 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectColumnMoved.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectColumnMoved.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookProjectColumnMoved
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookProjectColumnMovedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookProjectColumnMovedAction Action { get; set; } = global::G.WebhookProjectColumnMovedAction.Moved;
+        public global::G.WebhookProjectColumnMovedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectCreated.g.verified.cs
index 36041cd67b..124ccebc16 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectCreated.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookProjectCreated
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookProjectCreatedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookProjectCreatedAction Action { get; set; } = global::G.WebhookProjectCreatedAction.Created;
+        public global::G.WebhookProjectCreatedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectDeleted.g.verified.cs
index 139afbbd85..3badb39824 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectDeleted.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookProjectDeleted
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookProjectDeletedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookProjectDeletedAction Action { get; set; } = global::G.WebhookProjectDeletedAction.Deleted;
+        public global::G.WebhookProjectDeletedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectEdited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectEdited.g.verified.cs
index d00da10d2d..f8f791e525 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectEdited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectEdited.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookProjectEdited
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookProjectEditedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookProjectEditedAction Action { get; set; } = global::G.WebhookProjectEditedAction.Edited;
+        public global::G.WebhookProjectEditedAction Action { get; set; }
 
         /// <summary>
         /// The changes to the project if the action was `edited`.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectReopened.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectReopened.g.verified.cs
index 6a66a7b42e..dba1f05890 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectReopened.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectReopened.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookProjectReopened
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookProjectReopenedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookProjectReopenedAction Action { get; set; } = global::G.WebhookProjectReopenedAction.Reopened;
+        public global::G.WebhookProjectReopenedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ItemArchived.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ItemArchived.g.verified.cs
index 03a6c8c6bb..905d09e35d 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ItemArchived.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ItemArchived.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookProjectsV2ItemArchived
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookProjectsV2ItemArchivedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookProjectsV2ItemArchivedAction Action { get; set; } = global::G.WebhookProjectsV2ItemArchivedAction.Archived;
+        public global::G.WebhookProjectsV2ItemArchivedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ItemConverted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ItemConverted.g.verified.cs
index 698273e91a..bb4b3fc511 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ItemConverted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ItemConverted.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookProjectsV2ItemConverted
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookProjectsV2ItemConvertedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookProjectsV2ItemConvertedAction Action { get; set; } = global::G.WebhookProjectsV2ItemConvertedAction.Converted;
+        public global::G.WebhookProjectsV2ItemConvertedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ItemCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ItemCreated.g.verified.cs
index 6c04024c68..13ba10b0ab 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ItemCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ItemCreated.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookProjectsV2ItemCreated
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookProjectsV2ItemCreatedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookProjectsV2ItemCreatedAction Action { get; set; } = global::G.WebhookProjectsV2ItemCreatedAction.Created;
+        public global::G.WebhookProjectsV2ItemCreatedAction Action { get; set; }
 
         /// <summary>
         /// The GitHub App installation. Webhook payloads contain the `installation` property when the event is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ItemDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ItemDeleted.g.verified.cs
index dd0b2c7f5a..ab447a5c82 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ItemDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ItemDeleted.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookProjectsV2ItemDeleted
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookProjectsV2ItemDeletedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookProjectsV2ItemDeletedAction Action { get; set; } = global::G.WebhookProjectsV2ItemDeletedAction.Deleted;
+        public global::G.WebhookProjectsV2ItemDeletedAction Action { get; set; }
 
         /// <summary>
         /// The GitHub App installation. Webhook payloads contain the `installation` property when the event is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ItemEdited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ItemEdited.g.verified.cs
index 38774362f6..5b64022981 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ItemEdited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ItemEdited.g.verified.cs
@@ -16,8 +16,7 @@ public sealed partial class WebhookProjectsV2ItemEdited
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookProjectsV2ItemEditedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookProjectsV2ItemEditedAction Action { get; set; } = global::G.WebhookProjectsV2ItemEditedAction.Edited;
+        public global::G.WebhookProjectsV2ItemEditedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ItemReordered.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ItemReordered.g.verified.cs
index 6451dab3cd..cc388a97e9 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ItemReordered.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ItemReordered.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookProjectsV2ItemReordered
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookProjectsV2ItemReorderedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookProjectsV2ItemReorderedAction Action { get; set; } = global::G.WebhookProjectsV2ItemReorderedAction.Reordered;
+        public global::G.WebhookProjectsV2ItemReorderedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ItemRestored.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ItemRestored.g.verified.cs
index ac81866729..79d5290f0c 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ItemRestored.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ItemRestored.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookProjectsV2ItemRestored
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookProjectsV2ItemRestoredActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookProjectsV2ItemRestoredAction Action { get; set; } = global::G.WebhookProjectsV2ItemRestoredAction.Restored;
+        public global::G.WebhookProjectsV2ItemRestoredAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ProjectClosed.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ProjectClosed.g.verified.cs
index 5f9314acab..f68c787bda 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ProjectClosed.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ProjectClosed.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookProjectsV2ProjectClosed
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookProjectsV2ProjectClosedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookProjectsV2ProjectClosedAction Action { get; set; } = global::G.WebhookProjectsV2ProjectClosedAction.Closed;
+        public global::G.WebhookProjectsV2ProjectClosedAction Action { get; set; }
 
         /// <summary>
         /// The GitHub App installation. Webhook payloads contain the `installation` property when the event is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ProjectCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ProjectCreated.g.verified.cs
index a753fa666b..e94f5c341f 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ProjectCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ProjectCreated.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookProjectsV2ProjectCreated
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookProjectsV2ProjectCreatedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookProjectsV2ProjectCreatedAction Action { get; set; } = global::G.WebhookProjectsV2ProjectCreatedAction.Created;
+        public global::G.WebhookProjectsV2ProjectCreatedAction Action { get; set; }
 
         /// <summary>
         /// The GitHub App installation. Webhook payloads contain the `installation` property when the event is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ProjectDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ProjectDeleted.g.verified.cs
index 92f2ca2437..e575f2b7d8 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ProjectDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ProjectDeleted.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookProjectsV2ProjectDeleted
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookProjectsV2ProjectDeletedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookProjectsV2ProjectDeletedAction Action { get; set; } = global::G.WebhookProjectsV2ProjectDeletedAction.Deleted;
+        public global::G.WebhookProjectsV2ProjectDeletedAction Action { get; set; }
 
         /// <summary>
         /// The GitHub App installation. Webhook payloads contain the `installation` property when the event is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ProjectEdited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ProjectEdited.g.verified.cs
index 50805876f5..9eb02b9cb3 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ProjectEdited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ProjectEdited.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookProjectsV2ProjectEdited
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookProjectsV2ProjectEditedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookProjectsV2ProjectEditedAction Action { get; set; } = global::G.WebhookProjectsV2ProjectEditedAction.Edited;
+        public global::G.WebhookProjectsV2ProjectEditedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ProjectReopened.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ProjectReopened.g.verified.cs
index d486960b0d..186f9381ea 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ProjectReopened.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookProjectsV2ProjectReopened.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookProjectsV2ProjectReopened
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookProjectsV2ProjectReopenedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookProjectsV2ProjectReopenedAction Action { get; set; } = global::G.WebhookProjectsV2ProjectReopenedAction.Reopened;
+        public global::G.WebhookProjectsV2ProjectReopenedAction Action { get; set; }
 
         /// <summary>
         /// The GitHub App installation. Webhook payloads contain the `installation` property when the event is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestAssigned.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestAssigned.g.verified.cs
index 7c60e87ced..0cd6ecc791 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestAssigned.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestAssigned.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookPullRequestAssigned
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookPullRequestAssignedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookPullRequestAssignedAction Action { get; set; } = global::G.WebhookPullRequestAssignedAction.Assigned;
+        public global::G.WebhookPullRequestAssignedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestAutoMergeDisabled.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestAutoMergeDisabled.g.verified.cs
index 5925b39f51..13adbf6971 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestAutoMergeDisabled.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestAutoMergeDisabled.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookPullRequestAutoMergeDisabled
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookPullRequestAutoMergeDisabledActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookPullRequestAutoMergeDisabledAction Action { get; set; } = global::G.WebhookPullRequestAutoMergeDisabledAction.AutoMergeDisabled;
+        public global::G.WebhookPullRequestAutoMergeDisabledAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestAutoMergeEnabled.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestAutoMergeEnabled.g.verified.cs
index b2ec1fe8d4..d37dd73f90 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestAutoMergeEnabled.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestAutoMergeEnabled.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookPullRequestAutoMergeEnabled
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookPullRequestAutoMergeEnabledActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookPullRequestAutoMergeEnabledAction Action { get; set; } = global::G.WebhookPullRequestAutoMergeEnabledAction.AutoMergeEnabled;
+        public global::G.WebhookPullRequestAutoMergeEnabledAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestClosed.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestClosed.g.verified.cs
index 508cb01dc8..cbd677d0ab 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestClosed.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestClosed.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookPullRequestClosed
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookPullRequestClosedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookPullRequestClosedAction Action { get; set; } = global::G.WebhookPullRequestClosedAction.Closed;
+        public global::G.WebhookPullRequestClosedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestConvertedToDraft.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestConvertedToDraft.g.verified.cs
index f6815fd674..ee6ab13589 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestConvertedToDraft.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestConvertedToDraft.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookPullRequestConvertedToDraft
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookPullRequestConvertedToDraftActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookPullRequestConvertedToDraftAction Action { get; set; } = global::G.WebhookPullRequestConvertedToDraftAction.ConvertedToDraft;
+        public global::G.WebhookPullRequestConvertedToDraftAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestDemilestoned.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestDemilestoned.g.verified.cs
index fa9ca17a73..5252933466 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestDemilestoned.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestDemilestoned.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookPullRequestDemilestoned
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookPullRequestDemilestonedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookPullRequestDemilestonedAction Action { get; set; } = global::G.WebhookPullRequestDemilestonedAction.Demilestoned;
+        public global::G.WebhookPullRequestDemilestonedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestDequeued.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestDequeued.g.verified.cs
index e302baacf2..bee78da737 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestDequeued.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestDequeued.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookPullRequestDequeued
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookPullRequestDequeuedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookPullRequestDequeuedAction Action { get; set; } = global::G.WebhookPullRequestDequeuedAction.Dequeued;
+        public global::G.WebhookPullRequestDequeuedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestEdited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestEdited.g.verified.cs
index f749d9588e..02b3d3c884 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestEdited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestEdited.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookPullRequestEdited
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookPullRequestEditedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookPullRequestEditedAction Action { get; set; } = global::G.WebhookPullRequestEditedAction.Edited;
+        public global::G.WebhookPullRequestEditedAction Action { get; set; }
 
         /// <summary>
         /// The changes to the comment if the action was `edited`.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestEnqueued.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestEnqueued.g.verified.cs
index b825865002..314956471e 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestEnqueued.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestEnqueued.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookPullRequestEnqueued
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookPullRequestEnqueuedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookPullRequestEnqueuedAction Action { get; set; } = global::G.WebhookPullRequestEnqueuedAction.Enqueued;
+        public global::G.WebhookPullRequestEnqueuedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestLabeled.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestLabeled.g.verified.cs
index 5d983de268..8085148b95 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestLabeled.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestLabeled.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookPullRequestLabeled
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookPullRequestLabeledActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookPullRequestLabeledAction Action { get; set; } = global::G.WebhookPullRequestLabeledAction.Labeled;
+        public global::G.WebhookPullRequestLabeledAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestLocked.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestLocked.g.verified.cs
index 82ae604c69..4338f561a2 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestLocked.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestLocked.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookPullRequestLocked
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookPullRequestLockedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookPullRequestLockedAction Action { get; set; } = global::G.WebhookPullRequestLockedAction.Locked;
+        public global::G.WebhookPullRequestLockedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestMilestoned.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestMilestoned.g.verified.cs
index 647d950d1b..b13b846f8f 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestMilestoned.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestMilestoned.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookPullRequestMilestoned
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookPullRequestMilestonedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookPullRequestMilestonedAction Action { get; set; } = global::G.WebhookPullRequestMilestonedAction.Milestoned;
+        public global::G.WebhookPullRequestMilestonedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestOpened.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestOpened.g.verified.cs
index 7b209da256..e13975f687 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestOpened.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestOpened.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookPullRequestOpened
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookPullRequestOpenedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookPullRequestOpenedAction Action { get; set; } = global::G.WebhookPullRequestOpenedAction.Opened;
+        public global::G.WebhookPullRequestOpenedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReadyForReview.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReadyForReview.g.verified.cs
index 0a0035d4ac..6dbedc7091 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReadyForReview.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReadyForReview.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookPullRequestReadyForReview
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookPullRequestReadyForReviewActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookPullRequestReadyForReviewAction Action { get; set; } = global::G.WebhookPullRequestReadyForReviewAction.ReadyForReview;
+        public global::G.WebhookPullRequestReadyForReviewAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReopened.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReopened.g.verified.cs
index 556a4c74f4..642340ec7a 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReopened.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReopened.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookPullRequestReopened
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookPullRequestReopenedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookPullRequestReopenedAction Action { get; set; } = global::G.WebhookPullRequestReopenedAction.Reopened;
+        public global::G.WebhookPullRequestReopenedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewCommentCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewCommentCreated.g.verified.cs
index ba3040d5f2..6f63ab5491 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewCommentCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewCommentCreated.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookPullRequestReviewCommentCreated
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookPullRequestReviewCommentCreatedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookPullRequestReviewCommentCreatedAction Action { get; set; } = global::G.WebhookPullRequestReviewCommentCreatedAction.Created;
+        public global::G.WebhookPullRequestReviewCommentCreatedAction Action { get; set; }
 
         /// <summary>
         /// The [comment](https://docs.github.com/rest/pulls/comments#get-a-review-comment-for-a-pull-request) itself.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewCommentDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewCommentDeleted.g.verified.cs
index 684091b679..46a1b83e55 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewCommentDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewCommentDeleted.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookPullRequestReviewCommentDeleted
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookPullRequestReviewCommentDeletedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookPullRequestReviewCommentDeletedAction Action { get; set; } = global::G.WebhookPullRequestReviewCommentDeletedAction.Deleted;
+        public global::G.WebhookPullRequestReviewCommentDeletedAction Action { get; set; }
 
         /// <summary>
         /// The [comment](https://docs.github.com/rest/pulls/comments#get-a-review-comment-for-a-pull-request) itself.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewCommentEdited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewCommentEdited.g.verified.cs
index 6830eb0299..208e231f6d 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewCommentEdited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewCommentEdited.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookPullRequestReviewCommentEdited
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookPullRequestReviewCommentEditedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookPullRequestReviewCommentEditedAction Action { get; set; } = global::G.WebhookPullRequestReviewCommentEditedAction.Edited;
+        public global::G.WebhookPullRequestReviewCommentEditedAction Action { get; set; }
 
         /// <summary>
         /// The changes to the comment.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewDismissed.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewDismissed.g.verified.cs
index df68a6d287..bdb4404f9f 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewDismissed.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewDismissed.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookPullRequestReviewDismissed
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookPullRequestReviewDismissedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookPullRequestReviewDismissedAction Action { get; set; } = global::G.WebhookPullRequestReviewDismissedAction.Dismissed;
+        public global::G.WebhookPullRequestReviewDismissedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewEdited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewEdited.g.verified.cs
index 1f2108aab9..9dd8c277f8 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewEdited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewEdited.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookPullRequestReviewEdited
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookPullRequestReviewEditedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookPullRequestReviewEditedAction Action { get; set; } = global::G.WebhookPullRequestReviewEditedAction.Edited;
+        public global::G.WebhookPullRequestReviewEditedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewRequestRemovedVariant1.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewRequestRemovedVariant1.g.verified.cs
index 0e87461bd9..c6a6cc1be4 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewRequestRemovedVariant1.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewRequestRemovedVariant1.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookPullRequestReviewRequestRemovedVariant1
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookPullRequestReviewRequestRemovedVariant1ActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookPullRequestReviewRequestRemovedVariant1Action Action { get; set; } = global::G.WebhookPullRequestReviewRequestRemovedVariant1Action.ReviewRequestRemoved;
+        public global::G.WebhookPullRequestReviewRequestRemovedVariant1Action Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewRequestRemovedVariant2.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewRequestRemovedVariant2.g.verified.cs
index fed857ad31..581ab21851 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewRequestRemovedVariant2.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewRequestRemovedVariant2.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookPullRequestReviewRequestRemovedVariant2
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookPullRequestReviewRequestRemovedVariant2ActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookPullRequestReviewRequestRemovedVariant2Action Action { get; set; } = global::G.WebhookPullRequestReviewRequestRemovedVariant2Action.ReviewRequestRemoved;
+        public global::G.WebhookPullRequestReviewRequestRemovedVariant2Action Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewRequestedVariant1.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewRequestedVariant1.g.verified.cs
index 90757b0859..608960a87a 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewRequestedVariant1.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewRequestedVariant1.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookPullRequestReviewRequestedVariant1
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookPullRequestReviewRequestedVariant1ActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookPullRequestReviewRequestedVariant1Action Action { get; set; } = global::G.WebhookPullRequestReviewRequestedVariant1Action.ReviewRequested;
+        public global::G.WebhookPullRequestReviewRequestedVariant1Action Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewRequestedVariant2.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewRequestedVariant2.g.verified.cs
index bfc1fd8c44..00e75710b6 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewRequestedVariant2.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewRequestedVariant2.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookPullRequestReviewRequestedVariant2
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookPullRequestReviewRequestedVariant2ActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookPullRequestReviewRequestedVariant2Action Action { get; set; } = global::G.WebhookPullRequestReviewRequestedVariant2Action.ReviewRequested;
+        public global::G.WebhookPullRequestReviewRequestedVariant2Action Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewSubmitted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewSubmitted.g.verified.cs
index 6a36d04b76..7ca350c7ee 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewSubmitted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewSubmitted.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookPullRequestReviewSubmitted
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookPullRequestReviewSubmittedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookPullRequestReviewSubmittedAction Action { get; set; } = global::G.WebhookPullRequestReviewSubmittedAction.Submitted;
+        public global::G.WebhookPullRequestReviewSubmittedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewThreadResolved.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewThreadResolved.g.verified.cs
index 84b56f72aa..1f52ecf27d 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewThreadResolved.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewThreadResolved.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookPullRequestReviewThreadResolved
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookPullRequestReviewThreadResolvedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookPullRequestReviewThreadResolvedAction Action { get; set; } = global::G.WebhookPullRequestReviewThreadResolvedAction.Resolved;
+        public global::G.WebhookPullRequestReviewThreadResolvedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewThreadUnresolved.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewThreadUnresolved.g.verified.cs
index b633e24dbd..4a48acfa44 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewThreadUnresolved.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestReviewThreadUnresolved.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookPullRequestReviewThreadUnresolved
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookPullRequestReviewThreadUnresolvedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookPullRequestReviewThreadUnresolvedAction Action { get; set; } = global::G.WebhookPullRequestReviewThreadUnresolvedAction.Unresolved;
+        public global::G.WebhookPullRequestReviewThreadUnresolvedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestSynchronize.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestSynchronize.g.verified.cs
index d54ec9c0eb..c26058fc4b 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestSynchronize.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestSynchronize.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookPullRequestSynchronize
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookPullRequestSynchronizeActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookPullRequestSynchronizeAction Action { get; set; } = global::G.WebhookPullRequestSynchronizeAction.Synchronize;
+        public global::G.WebhookPullRequestSynchronizeAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestUnassigned.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestUnassigned.g.verified.cs
index 966e9a4ea0..2ecd0b50db 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestUnassigned.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestUnassigned.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookPullRequestUnassigned
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookPullRequestUnassignedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookPullRequestUnassignedAction Action { get; set; } = global::G.WebhookPullRequestUnassignedAction.Unassigned;
+        public global::G.WebhookPullRequestUnassignedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestUnlabeled.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestUnlabeled.g.verified.cs
index 5b21c6c7a9..ed820ce65b 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestUnlabeled.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestUnlabeled.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookPullRequestUnlabeled
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookPullRequestUnlabeledActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookPullRequestUnlabeledAction Action { get; set; } = global::G.WebhookPullRequestUnlabeledAction.Unlabeled;
+        public global::G.WebhookPullRequestUnlabeledAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestUnlocked.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestUnlocked.g.verified.cs
index 1ed1ffda88..4df4e415bc 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestUnlocked.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookPullRequestUnlocked.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookPullRequestUnlocked
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookPullRequestUnlockedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookPullRequestUnlockedAction Action { get; set; } = global::G.WebhookPullRequestUnlockedAction.Unlocked;
+        public global::G.WebhookPullRequestUnlockedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRegistryPackagePublished.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRegistryPackagePublished.g.verified.cs
index 56ccf96a0f..bcf568d17a 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRegistryPackagePublished.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRegistryPackagePublished.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookRegistryPackagePublished
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookRegistryPackagePublishedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookRegistryPackagePublishedAction Action { get; set; } = global::G.WebhookRegistryPackagePublishedAction.Published;
+        public global::G.WebhookRegistryPackagePublishedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRegistryPackageUpdated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRegistryPackageUpdated.g.verified.cs
index b8ed1d890a..8f1641f997 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRegistryPackageUpdated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRegistryPackageUpdated.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookRegistryPackageUpdated
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookRegistryPackageUpdatedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookRegistryPackageUpdatedAction Action { get; set; } = global::G.WebhookRegistryPackageUpdatedAction.Updated;
+        public global::G.WebhookRegistryPackageUpdatedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookReleaseCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookReleaseCreated.g.verified.cs
index f37f4ddd17..35c862d72a 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookReleaseCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookReleaseCreated.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookReleaseCreated
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookReleaseCreatedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookReleaseCreatedAction Action { get; set; } = global::G.WebhookReleaseCreatedAction.Created;
+        public global::G.WebhookReleaseCreatedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookReleaseDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookReleaseDeleted.g.verified.cs
index 78e887d1f9..3351f73bb2 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookReleaseDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookReleaseDeleted.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookReleaseDeleted
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookReleaseDeletedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookReleaseDeletedAction Action { get; set; } = global::G.WebhookReleaseDeletedAction.Deleted;
+        public global::G.WebhookReleaseDeletedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookReleaseEdited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookReleaseEdited.g.verified.cs
index 1ae32966ed..79e39908a5 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookReleaseEdited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookReleaseEdited.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookReleaseEdited
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookReleaseEditedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookReleaseEditedAction Action { get; set; } = global::G.WebhookReleaseEditedAction.Edited;
+        public global::G.WebhookReleaseEditedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookReleasePrereleased.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookReleasePrereleased.g.verified.cs
index 88582cbed3..d20975bc82 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookReleasePrereleased.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookReleasePrereleased.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookReleasePrereleased
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookReleasePrereleasedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookReleasePrereleasedAction Action { get; set; } = global::G.WebhookReleasePrereleasedAction.Prereleased;
+        public global::G.WebhookReleasePrereleasedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookReleasePrereleasedReleaseAsset.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookReleasePrereleasedReleaseAsset.g.verified.cs
index 0755a6891c..5d53a83d27 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookReleasePrereleasedReleaseAsset.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookReleasePrereleasedReleaseAsset.g.verified.cs
@@ -77,8 +77,7 @@ public sealed partial class WebhookReleasePrereleasedReleaseAsset
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("state")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookReleasePrereleasedReleaseAssetStateJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookReleasePrereleasedReleaseAssetState State { get; set; } = global::G.WebhookReleasePrereleasedReleaseAssetState.Uploaded;
+        public global::G.WebhookReleasePrereleasedReleaseAssetState State { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookReleasePublished.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookReleasePublished.g.verified.cs
index 5660aae8bc..352dddd33a 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookReleasePublished.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookReleasePublished.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookReleasePublished
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookReleasePublishedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookReleasePublishedAction Action { get; set; } = global::G.WebhookReleasePublishedAction.Published;
+        public global::G.WebhookReleasePublishedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookReleaseReleased.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookReleaseReleased.g.verified.cs
index 75c7a80537..bc9f04cd4e 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookReleaseReleased.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookReleaseReleased.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookReleaseReleased
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookReleaseReleasedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookReleaseReleasedAction Action { get; set; } = global::G.WebhookReleaseReleasedAction.Released;
+        public global::G.WebhookReleaseReleasedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookReleaseUnpublished.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookReleaseUnpublished.g.verified.cs
index 676dfef764..f872a2637c 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookReleaseUnpublished.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookReleaseUnpublished.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookReleaseUnpublished
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookReleaseUnpublishedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookReleaseUnpublishedAction Action { get; set; } = global::G.WebhookReleaseUnpublishedAction.Unpublished;
+        public global::G.WebhookReleaseUnpublishedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryAdvisoryPublished.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryAdvisoryPublished.g.verified.cs
index b0d41db156..460925d383 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryAdvisoryPublished.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryAdvisoryPublished.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookRepositoryAdvisoryPublished
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookRepositoryAdvisoryPublishedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookRepositoryAdvisoryPublishedAction Action { get; set; } = global::G.WebhookRepositoryAdvisoryPublishedAction.Published;
+        public global::G.WebhookRepositoryAdvisoryPublishedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryAdvisoryReported.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryAdvisoryReported.g.verified.cs
index 071f74373e..00dfb8889d 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryAdvisoryReported.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryAdvisoryReported.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookRepositoryAdvisoryReported
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookRepositoryAdvisoryReportedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookRepositoryAdvisoryReportedAction Action { get; set; } = global::G.WebhookRepositoryAdvisoryReportedAction.Reported;
+        public global::G.WebhookRepositoryAdvisoryReportedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryArchived.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryArchived.g.verified.cs
index 5ee33fee9f..658deb4b41 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryArchived.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryArchived.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookRepositoryArchived
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookRepositoryArchivedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookRepositoryArchivedAction Action { get; set; } = global::G.WebhookRepositoryArchivedAction.Archived;
+        public global::G.WebhookRepositoryArchivedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryCreated.g.verified.cs
index b4e6d4b575..f487231f73 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryCreated.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookRepositoryCreated
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookRepositoryCreatedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookRepositoryCreatedAction Action { get; set; } = global::G.WebhookRepositoryCreatedAction.Created;
+        public global::G.WebhookRepositoryCreatedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryDeleted.g.verified.cs
index a3f0e9e736..7600d7ff19 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryDeleted.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookRepositoryDeleted
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookRepositoryDeletedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookRepositoryDeletedAction Action { get; set; } = global::G.WebhookRepositoryDeletedAction.Deleted;
+        public global::G.WebhookRepositoryDeletedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryEdited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryEdited.g.verified.cs
index aef3813cad..d80b0d3c88 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryEdited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryEdited.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookRepositoryEdited
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookRepositoryEditedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookRepositoryEditedAction Action { get; set; } = global::G.WebhookRepositoryEditedAction.Edited;
+        public global::G.WebhookRepositoryEditedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryPrivatized.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryPrivatized.g.verified.cs
index 673765f6a3..2d8e241ada 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryPrivatized.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryPrivatized.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookRepositoryPrivatized
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookRepositoryPrivatizedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookRepositoryPrivatizedAction Action { get; set; } = global::G.WebhookRepositoryPrivatizedAction.Privatized;
+        public global::G.WebhookRepositoryPrivatizedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryPublicized.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryPublicized.g.verified.cs
index 0eb72447b9..7163d300d3 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryPublicized.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryPublicized.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookRepositoryPublicized
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookRepositoryPublicizedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookRepositoryPublicizedAction Action { get; set; } = global::G.WebhookRepositoryPublicizedAction.Publicized;
+        public global::G.WebhookRepositoryPublicizedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryRenamed.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryRenamed.g.verified.cs
index 27140b381b..70159895b6 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryRenamed.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryRenamed.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookRepositoryRenamed
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookRepositoryRenamedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookRepositoryRenamedAction Action { get; set; } = global::G.WebhookRepositoryRenamedAction.Renamed;
+        public global::G.WebhookRepositoryRenamedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryRulesetCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryRulesetCreated.g.verified.cs
index b1b695946f..c2622e3b46 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryRulesetCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryRulesetCreated.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookRepositoryRulesetCreated
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookRepositoryRulesetCreatedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookRepositoryRulesetCreatedAction Action { get; set; } = global::G.WebhookRepositoryRulesetCreatedAction.Created;
+        public global::G.WebhookRepositoryRulesetCreatedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryRulesetDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryRulesetDeleted.g.verified.cs
index 8bae98039e..d7e313a768 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryRulesetDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryRulesetDeleted.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookRepositoryRulesetDeleted
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookRepositoryRulesetDeletedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookRepositoryRulesetDeletedAction Action { get; set; } = global::G.WebhookRepositoryRulesetDeletedAction.Deleted;
+        public global::G.WebhookRepositoryRulesetDeletedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryRulesetEdited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryRulesetEdited.g.verified.cs
index fdc3c55826..2b1111e293 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryRulesetEdited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryRulesetEdited.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookRepositoryRulesetEdited
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookRepositoryRulesetEditedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookRepositoryRulesetEditedAction Action { get; set; } = global::G.WebhookRepositoryRulesetEditedAction.Edited;
+        public global::G.WebhookRepositoryRulesetEditedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryTransferred.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryTransferred.g.verified.cs
index 3c07acb63d..6fb09b425a 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryTransferred.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryTransferred.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookRepositoryTransferred
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookRepositoryTransferredActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookRepositoryTransferredAction Action { get; set; } = global::G.WebhookRepositoryTransferredAction.Transferred;
+        public global::G.WebhookRepositoryTransferredAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryUnarchived.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryUnarchived.g.verified.cs
index 98dd4f1b5d..41fec16c07 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryUnarchived.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryUnarchived.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookRepositoryUnarchived
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookRepositoryUnarchivedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookRepositoryUnarchivedAction Action { get; set; } = global::G.WebhookRepositoryUnarchivedAction.Unarchived;
+        public global::G.WebhookRepositoryUnarchivedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryVulnerabilityAlertCreate.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryVulnerabilityAlertCreate.g.verified.cs
index 7676274e47..6d6263730d 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryVulnerabilityAlertCreate.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryVulnerabilityAlertCreate.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookRepositoryVulnerabilityAlertCreate
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookRepositoryVulnerabilityAlertCreateActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookRepositoryVulnerabilityAlertCreateAction Action { get; set; } = global::G.WebhookRepositoryVulnerabilityAlertCreateAction.Create;
+        public global::G.WebhookRepositoryVulnerabilityAlertCreateAction Action { get; set; }
 
         /// <summary>
         /// The security alert of the vulnerable dependency.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryVulnerabilityAlertDismiss.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryVulnerabilityAlertDismiss.g.verified.cs
index 1100835d96..270727af7c 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryVulnerabilityAlertDismiss.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryVulnerabilityAlertDismiss.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookRepositoryVulnerabilityAlertDismiss
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookRepositoryVulnerabilityAlertDismissActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookRepositoryVulnerabilityAlertDismissAction Action { get; set; } = global::G.WebhookRepositoryVulnerabilityAlertDismissAction.Dismiss;
+        public global::G.WebhookRepositoryVulnerabilityAlertDismissAction Action { get; set; }
 
         /// <summary>
         /// The security alert of the vulnerable dependency.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryVulnerabilityAlertDismissAlert.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryVulnerabilityAlertDismissAlert.g.verified.cs
index 917cd89a03..be50957d05 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryVulnerabilityAlertDismissAlert.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryVulnerabilityAlertDismissAlert.g.verified.cs
@@ -129,8 +129,7 @@ public sealed partial class WebhookRepositoryVulnerabilityAlertDismissAlert
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("state")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookRepositoryVulnerabilityAlertDismissAlertStateJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookRepositoryVulnerabilityAlertDismissAlertState State { get; set; } = global::G.WebhookRepositoryVulnerabilityAlertDismissAlertState.Dismissed;
+        public global::G.WebhookRepositoryVulnerabilityAlertDismissAlertState State { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryVulnerabilityAlertReopen.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryVulnerabilityAlertReopen.g.verified.cs
index 969091c83c..ba3c7f6889 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryVulnerabilityAlertReopen.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryVulnerabilityAlertReopen.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookRepositoryVulnerabilityAlertReopen
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookRepositoryVulnerabilityAlertReopenActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookRepositoryVulnerabilityAlertReopenAction Action { get; set; } = global::G.WebhookRepositoryVulnerabilityAlertReopenAction.Reopen;
+        public global::G.WebhookRepositoryVulnerabilityAlertReopenAction Action { get; set; }
 
         /// <summary>
         /// The security alert of the vulnerable dependency.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryVulnerabilityAlertResolve.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryVulnerabilityAlertResolve.g.verified.cs
index 2f9599db9f..678a9578cf 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryVulnerabilityAlertResolve.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookRepositoryVulnerabilityAlertResolve.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookRepositoryVulnerabilityAlertResolve
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookRepositoryVulnerabilityAlertResolveActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookRepositoryVulnerabilityAlertResolveAction Action { get; set; } = global::G.WebhookRepositoryVulnerabilityAlertResolveAction.Resolve;
+        public global::G.WebhookRepositoryVulnerabilityAlertResolveAction Action { get; set; }
 
         /// <summary>
         /// The security alert of the vulnerable dependency.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSecretScanningAlertCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSecretScanningAlertCreated.g.verified.cs
index e49de4de2a..2272c32c81 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSecretScanningAlertCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSecretScanningAlertCreated.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookSecretScanningAlertCreated
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookSecretScanningAlertCreatedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookSecretScanningAlertCreatedAction Action { get; set; } = global::G.WebhookSecretScanningAlertCreatedAction.Created;
+        public global::G.WebhookSecretScanningAlertCreatedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSecretScanningAlertReopened.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSecretScanningAlertReopened.g.verified.cs
index a34cd9183c..f9c29d612d 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSecretScanningAlertReopened.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSecretScanningAlertReopened.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookSecretScanningAlertReopened
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookSecretScanningAlertReopenedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookSecretScanningAlertReopenedAction Action { get; set; } = global::G.WebhookSecretScanningAlertReopenedAction.Reopened;
+        public global::G.WebhookSecretScanningAlertReopenedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSecretScanningAlertResolved.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSecretScanningAlertResolved.g.verified.cs
index 9154ea7552..b5a4b55bdb 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSecretScanningAlertResolved.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSecretScanningAlertResolved.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookSecretScanningAlertResolved
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookSecretScanningAlertResolvedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookSecretScanningAlertResolvedAction Action { get; set; } = global::G.WebhookSecretScanningAlertResolvedAction.Resolved;
+        public global::G.WebhookSecretScanningAlertResolvedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSecretScanningAlertRevoked.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSecretScanningAlertRevoked.g.verified.cs
index b15543c09c..0a5ea8e27c 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSecretScanningAlertRevoked.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSecretScanningAlertRevoked.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookSecretScanningAlertRevoked
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookSecretScanningAlertRevokedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookSecretScanningAlertRevokedAction Action { get; set; } = global::G.WebhookSecretScanningAlertRevokedAction.Revoked;
+        public global::G.WebhookSecretScanningAlertRevokedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSecretScanningAlertValidated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSecretScanningAlertValidated.g.verified.cs
index e5691445a4..027dc9348e 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSecretScanningAlertValidated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSecretScanningAlertValidated.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookSecretScanningAlertValidated
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookSecretScanningAlertValidatedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookSecretScanningAlertValidatedAction Action { get; set; } = global::G.WebhookSecretScanningAlertValidatedAction.Validated;
+        public global::G.WebhookSecretScanningAlertValidatedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSecurityAdvisoryPublished.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSecurityAdvisoryPublished.g.verified.cs
index 3e4df8de2c..7022179b37 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSecurityAdvisoryPublished.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSecurityAdvisoryPublished.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookSecurityAdvisoryPublished
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookSecurityAdvisoryPublishedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookSecurityAdvisoryPublishedAction Action { get; set; } = global::G.WebhookSecurityAdvisoryPublishedAction.Published;
+        public global::G.WebhookSecurityAdvisoryPublishedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSecurityAdvisoryUpdated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSecurityAdvisoryUpdated.g.verified.cs
index 2f6e2f0c13..f3fc53eae8 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSecurityAdvisoryUpdated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSecurityAdvisoryUpdated.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookSecurityAdvisoryUpdated
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookSecurityAdvisoryUpdatedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookSecurityAdvisoryUpdatedAction Action { get; set; } = global::G.WebhookSecurityAdvisoryUpdatedAction.Updated;
+        public global::G.WebhookSecurityAdvisoryUpdatedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSecurityAdvisoryWithdrawn.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSecurityAdvisoryWithdrawn.g.verified.cs
index 69fb344d2e..dbd1c73626 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSecurityAdvisoryWithdrawn.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSecurityAdvisoryWithdrawn.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookSecurityAdvisoryWithdrawn
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookSecurityAdvisoryWithdrawnActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookSecurityAdvisoryWithdrawnAction Action { get; set; } = global::G.WebhookSecurityAdvisoryWithdrawnAction.Withdrawn;
+        public global::G.WebhookSecurityAdvisoryWithdrawnAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSponsorshipCancelled.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSponsorshipCancelled.g.verified.cs
index 32b139ed54..40b3a358f9 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSponsorshipCancelled.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSponsorshipCancelled.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookSponsorshipCancelled
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookSponsorshipCancelledActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookSponsorshipCancelledAction Action { get; set; } = global::G.WebhookSponsorshipCancelledAction.Cancelled;
+        public global::G.WebhookSponsorshipCancelledAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSponsorshipCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSponsorshipCreated.g.verified.cs
index a5162b46d5..3bddff6ecf 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSponsorshipCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSponsorshipCreated.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookSponsorshipCreated
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookSponsorshipCreatedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookSponsorshipCreatedAction Action { get; set; } = global::G.WebhookSponsorshipCreatedAction.Created;
+        public global::G.WebhookSponsorshipCreatedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSponsorshipEdited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSponsorshipEdited.g.verified.cs
index fd444be324..2a381bd1a0 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSponsorshipEdited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSponsorshipEdited.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookSponsorshipEdited
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookSponsorshipEditedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookSponsorshipEditedAction Action { get; set; } = global::G.WebhookSponsorshipEditedAction.Edited;
+        public global::G.WebhookSponsorshipEditedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSponsorshipPendingCancellation.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSponsorshipPendingCancellation.g.verified.cs
index a7db5602ed..b932ac7454 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSponsorshipPendingCancellation.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSponsorshipPendingCancellation.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookSponsorshipPendingCancellation
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookSponsorshipPendingCancellationActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookSponsorshipPendingCancellationAction Action { get; set; } = global::G.WebhookSponsorshipPendingCancellationAction.PendingCancellation;
+        public global::G.WebhookSponsorshipPendingCancellationAction Action { get; set; }
 
         /// <summary>
         /// The `pending_cancellation` and `pending_tier_change` event types will include the date the cancellation or tier change will take effect.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSponsorshipPendingTierChange.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSponsorshipPendingTierChange.g.verified.cs
index 3ab4809562..2ed229977e 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSponsorshipPendingTierChange.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSponsorshipPendingTierChange.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookSponsorshipPendingTierChange
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookSponsorshipPendingTierChangeActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookSponsorshipPendingTierChangeAction Action { get; set; } = global::G.WebhookSponsorshipPendingTierChangeAction.PendingTierChange;
+        public global::G.WebhookSponsorshipPendingTierChangeAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSponsorshipTierChanged.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSponsorshipTierChanged.g.verified.cs
index ff8b356eca..a93761a174 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSponsorshipTierChanged.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookSponsorshipTierChanged.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookSponsorshipTierChanged
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookSponsorshipTierChangedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookSponsorshipTierChangedAction Action { get; set; } = global::G.WebhookSponsorshipTierChangedAction.TierChanged;
+        public global::G.WebhookSponsorshipTierChangedAction Action { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookStarCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookStarCreated.g.verified.cs
index c449abfda1..5b9b040cc7 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookStarCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookStarCreated.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookStarCreated
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookStarCreatedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookStarCreatedAction Action { get; set; } = global::G.WebhookStarCreatedAction.Created;
+        public global::G.WebhookStarCreatedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookStarDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookStarDeleted.g.verified.cs
index 1932a484c9..ec950d5b5f 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookStarDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookStarDeleted.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookStarDeleted
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookStarDeletedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookStarDeletedAction Action { get; set; } = global::G.WebhookStarDeletedAction.Deleted;
+        public global::G.WebhookStarDeletedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookTeamAddedToRepository.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookTeamAddedToRepository.g.verified.cs
index b8d9e94570..25cde62398 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookTeamAddedToRepository.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookTeamAddedToRepository.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookTeamAddedToRepository
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookTeamAddedToRepositoryActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookTeamAddedToRepositoryAction Action { get; set; } = global::G.WebhookTeamAddedToRepositoryAction.AddedToRepository;
+        public global::G.WebhookTeamAddedToRepositoryAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookTeamCreated.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookTeamCreated.g.verified.cs
index 7bc3ebd3d4..08e45100fd 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookTeamCreated.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookTeamCreated.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookTeamCreated
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookTeamCreatedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookTeamCreatedAction Action { get; set; } = global::G.WebhookTeamCreatedAction.Created;
+        public global::G.WebhookTeamCreatedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookTeamDeleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookTeamDeleted.g.verified.cs
index ffdec34534..a938412d11 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookTeamDeleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookTeamDeleted.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookTeamDeleted
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookTeamDeletedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookTeamDeletedAction Action { get; set; } = global::G.WebhookTeamDeletedAction.Deleted;
+        public global::G.WebhookTeamDeletedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookTeamEdited.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookTeamEdited.g.verified.cs
index 8430fa5341..ed7a3510c4 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookTeamEdited.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookTeamEdited.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookTeamEdited
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookTeamEditedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookTeamEditedAction Action { get; set; } = global::G.WebhookTeamEditedAction.Edited;
+        public global::G.WebhookTeamEditedAction Action { get; set; }
 
         /// <summary>
         /// The changes to the team if the action was `edited`.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookTeamRemovedFromRepository.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookTeamRemovedFromRepository.g.verified.cs
index 07f86cb49f..a76d404934 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookTeamRemovedFromRepository.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookTeamRemovedFromRepository.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookTeamRemovedFromRepository
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookTeamRemovedFromRepositoryActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookTeamRemovedFromRepositoryAction Action { get; set; } = global::G.WebhookTeamRemovedFromRepositoryAction.RemovedFromRepository;
+        public global::G.WebhookTeamRemovedFromRepositoryAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookWatchStarted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookWatchStarted.g.verified.cs
index 97e3215865..32dd50023a 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookWatchStarted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookWatchStarted.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookWatchStarted
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookWatchStartedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookWatchStartedAction Action { get; set; } = global::G.WebhookWatchStartedAction.Started;
+        public global::G.WebhookWatchStartedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookWorkflowJobCompleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookWorkflowJobCompleted.g.verified.cs
index 5b1664d8e8..3cc6e4775e 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookWorkflowJobCompleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookWorkflowJobCompleted.g.verified.cs
@@ -16,8 +16,7 @@ public sealed partial class WebhookWorkflowJobCompleted
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookWorkflowJobCompletedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookWorkflowJobCompletedAction Action { get; set; } = global::G.WebhookWorkflowJobCompletedAction.Completed;
+        public global::G.WebhookWorkflowJobCompletedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookWorkflowJobInProgress.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookWorkflowJobInProgress.g.verified.cs
index e5c7d20eee..62d1e80a63 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookWorkflowJobInProgress.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookWorkflowJobInProgress.g.verified.cs
@@ -16,8 +16,7 @@ public sealed partial class WebhookWorkflowJobInProgress
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookWorkflowJobInProgressActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookWorkflowJobInProgressAction Action { get; set; } = global::G.WebhookWorkflowJobInProgressAction.InProgress;
+        public global::G.WebhookWorkflowJobInProgressAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookWorkflowJobQueued.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookWorkflowJobQueued.g.verified.cs
index c45ff9d66f..e178029fd6 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookWorkflowJobQueued.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookWorkflowJobQueued.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookWorkflowJobQueued
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookWorkflowJobQueuedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookWorkflowJobQueuedAction Action { get; set; } = global::G.WebhookWorkflowJobQueuedAction.Queued;
+        public global::G.WebhookWorkflowJobQueuedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookWorkflowJobWaiting.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookWorkflowJobWaiting.g.verified.cs
index 8e2e2d6de1..59c6e2072e 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookWorkflowJobWaiting.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookWorkflowJobWaiting.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookWorkflowJobWaiting
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookWorkflowJobWaitingActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookWorkflowJobWaitingAction Action { get; set; } = global::G.WebhookWorkflowJobWaitingAction.Waiting;
+        public global::G.WebhookWorkflowJobWaitingAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookWorkflowRunCompleted.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookWorkflowRunCompleted.g.verified.cs
index c0783dacae..dade2cf9f5 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookWorkflowRunCompleted.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookWorkflowRunCompleted.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookWorkflowRunCompleted
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookWorkflowRunCompletedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookWorkflowRunCompletedAction Action { get; set; } = global::G.WebhookWorkflowRunCompletedAction.Completed;
+        public global::G.WebhookWorkflowRunCompletedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookWorkflowRunInProgress.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookWorkflowRunInProgress.g.verified.cs
index 5b58961739..822ca7c052 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookWorkflowRunInProgress.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookWorkflowRunInProgress.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookWorkflowRunInProgress
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookWorkflowRunInProgressActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookWorkflowRunInProgressAction Action { get; set; } = global::G.WebhookWorkflowRunInProgressAction.InProgress;
+        public global::G.WebhookWorkflowRunInProgressAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookWorkflowRunRequested.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookWorkflowRunRequested.g.verified.cs
index 81f03e10b1..e57dcc0abe 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookWorkflowRunRequested.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhookWorkflowRunRequested.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class WebhookWorkflowRunRequested
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("action")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhookWorkflowRunRequestedActionJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhookWorkflowRunRequestedAction Action { get; set; } = global::G.WebhookWorkflowRunRequestedAction.Requested;
+        public global::G.WebhookWorkflowRunRequestedAction Action { get; set; }
 
         /// <summary>
         /// An enterprise on GitHub. Webhook payloads contain the `enterprise` property when the webhook is configured<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhooksAlert.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhooksAlert.g.verified.cs
index 37805b251a..c6d46b4dc7 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhooksAlert.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhooksAlert.g.verified.cs
@@ -120,8 +120,7 @@ public sealed partial class WebhooksAlert
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("state")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhooksAlertStateJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhooksAlertState State { get; set; } = global::G.WebhooksAlertState.Open;
+        public global::G.WebhooksAlertState State { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhooksRelease1Asset.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhooksRelease1Asset.g.verified.cs
index 0c7573aedb..4249d64edd 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhooksRelease1Asset.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhooksRelease1Asset.g.verified.cs
@@ -77,8 +77,7 @@ public sealed partial class WebhooksRelease1Asset
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("state")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhooksRelease1AssetStateJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhooksRelease1AssetState State { get; set; } = global::G.WebhooksRelease1AssetState.Uploaded;
+        public global::G.WebhooksRelease1AssetState State { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhooksReleaseAsset.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhooksReleaseAsset.g.verified.cs
index ce7388986d..fd9a70d64d 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhooksReleaseAsset.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.Models.WebhooksReleaseAsset.g.verified.cs
@@ -77,8 +77,7 @@ public sealed partial class WebhooksReleaseAsset
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("state")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.WebhooksReleaseAssetStateJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.WebhooksReleaseAssetState State { get; set; } = global::G.WebhooksReleaseAssetState.Uploaded;
+        public global::G.WebhooksReleaseAssetState State { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.OrgsClient.OrgsUpdateMembershipForAuthenticatedUser.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.OrgsClient.OrgsUpdateMembershipForAuthenticatedUser.g.verified.cs
index 6e37d3ef40..1f9a2c40e4 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.OrgsClient.OrgsUpdateMembershipForAuthenticatedUser.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.OrgsClient.OrgsUpdateMembershipForAuthenticatedUser.g.verified.cs
@@ -114,7 +114,7 @@ partial void ProcessOrgsUpdateMembershipForAuthenticatedUserResponseContent(
         /// <exception cref="global::System.InvalidOperationException"></exception>
         public async global::System.Threading.Tasks.Task<global::G.OrgMembership> OrgsUpdateMembershipForAuthenticatedUserAsync(
             string org,
-            global::G.OrgsUpdateMembershipForAuthenticatedUserRequestState state,
+            global::G.OrgsUpdateMembershipForAuthenticatedUserRequestState state = default,
             global::System.Threading.CancellationToken cancellationToken = default)
         {
             var request = new global::G.OrgsUpdateMembershipForAuthenticatedUserRequest
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.OrgsClient.OrgsUpdatePatAccess.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.OrgsClient.OrgsUpdatePatAccess.g.verified.cs
index c74c1e6898..22502c5171 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.OrgsClient.OrgsUpdatePatAccess.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.OrgsClient.OrgsUpdatePatAccess.g.verified.cs
@@ -124,7 +124,7 @@ partial void ProcessOrgsUpdatePatAccessResponseContent(
         public async global::System.Threading.Tasks.Task<global::G.BasicError> OrgsUpdatePatAccessAsync(
             string org,
             int patId,
-            global::G.OrgsUpdatePatAccessRequestAction action,
+            global::G.OrgsUpdatePatAccessRequestAction action = default,
             global::System.Threading.CancellationToken cancellationToken = default)
         {
             var request = new global::G.OrgsUpdatePatAccessRequest
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.OrgsClient.OrgsUpdatePatAccesses.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.OrgsClient.OrgsUpdatePatAccesses.g.verified.cs
index f9a478c7d6..d463a793f1 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.OrgsClient.OrgsUpdatePatAccesses.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/GitHub/SystemTextJson/_#G.OrgsClient.OrgsUpdatePatAccesses.g.verified.cs
@@ -119,8 +119,8 @@ partial void ProcessOrgsUpdatePatAccessesResponseContent(
         /// <exception cref="global::System.InvalidOperationException"></exception>
         public async global::System.Threading.Tasks.Task<global::G.BasicError> OrgsUpdatePatAccessesAsync(
             string org,
-            global::G.OrgsUpdatePatAccessesRequestAction action,
             global::System.Collections.Generic.IList<int> patIds,
+            global::G.OrgsUpdatePatAccessesRequestAction action = default,
             global::System.Threading.CancellationToken cancellationToken = default)
         {
             var request = new global::G.OrgsUpdatePatAccessesRequest
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.BatchClient.CreateBatch.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.BatchClient.CreateBatch.g.verified.cs
index f447e0fc7d..5b0d922dbf 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.BatchClient.CreateBatch.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.BatchClient.CreateBatch.g.verified.cs
@@ -117,7 +117,7 @@ partial void ProcessCreateBatchResponseContent(
         public async global::System.Threading.Tasks.Task<global::G.Batch> CreateBatchAsync(
             string inputFileId,
             global::G.CreateBatchRequestEndpoint endpoint,
-            global::G.CreateBatchRequestCompletionWindow completionWindow,
+            global::G.CreateBatchRequestCompletionWindow completionWindow = default,
             global::G.CreateBatchRequestMetadata? metadata = default,
             global::System.Threading.CancellationToken cancellationToken = default)
         {
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.AssistantObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.AssistantObject.g.verified.cs
index 31ffe1df1c..b2d85305ff 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.AssistantObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.AssistantObject.g.verified.cs
@@ -20,8 +20,8 @@ public sealed partial class AssistantObject
         /// <summary>
         /// The object type, which is always `assistant`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.AssistantObjectObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.AssistantObjectObject Object { get; set; }
 
         /// <summary>
         /// The Unix timestamp (in seconds) for when the assistant was created.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.AssistantToolsCode.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.AssistantToolsCode.g.verified.cs
index 226232fb49..0acf02f95f 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.AssistantToolsCode.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.AssistantToolsCode.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class AssistantToolsCode
         /// <summary>
         /// The type of tool being defined: `code_interpreter`
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.AssistantToolsCodeType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.AssistantToolsCodeType Type { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.AssistantToolsFileSearch.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.AssistantToolsFileSearch.g.verified.cs
index 12b2b6e944..b6db589b44 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.AssistantToolsFileSearch.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.AssistantToolsFileSearch.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class AssistantToolsFileSearch
         /// <summary>
         /// The type of tool being defined: `file_search`
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.AssistantToolsFileSearchType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.AssistantToolsFileSearchType Type { get; set; }
 
         /// <summary>
         /// Overrides for the file search tool.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.AssistantToolsFileSearchTypeOnly.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.AssistantToolsFileSearchTypeOnly.g.verified.cs
index dd3dc9ec39..912ba60e9f 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.AssistantToolsFileSearchTypeOnly.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.AssistantToolsFileSearchTypeOnly.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class AssistantToolsFileSearchTypeOnly
         /// <summary>
         /// The type of tool being defined: `file_search`
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.AssistantToolsFileSearchTypeOnlyType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.AssistantToolsFileSearchTypeOnlyType Type { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.AssistantToolsFunction.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.AssistantToolsFunction.g.verified.cs
index be8f660dc0..bb5a9f21dd 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.AssistantToolsFunction.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.AssistantToolsFunction.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class AssistantToolsFunction
         /// <summary>
         /// The type of tool being defined: `function`
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.AssistantToolsFunctionType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.AssistantToolsFunctionType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.AutoChunkingStrategyRequestParam.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.AutoChunkingStrategyRequestParam.g.verified.cs
index bc63d685d7..8766485eaf 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.AutoChunkingStrategyRequestParam.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.AutoChunkingStrategyRequestParam.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class AutoChunkingStrategyRequestParam
         /// <summary>
         /// Always `auto`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.AutoChunkingStrategyRequestParamType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.AutoChunkingStrategyRequestParamType Type { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.Batch.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.Batch.g.verified.cs
index ffba127964..d21d9dae42 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.Batch.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.Batch.g.verified.cs
@@ -18,8 +18,8 @@ public sealed partial class Batch
         /// <summary>
         /// The object type, which is always `batch`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.BatchObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.BatchObject Object { get; set; }
 
         /// <summary>
         /// The OpenAI API endpoint used by the batch.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionMessageToolCall.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionMessageToolCall.g.verified.cs
index 223c6641df..2654bbca35 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionMessageToolCall.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionMessageToolCall.g.verified.cs
@@ -18,8 +18,8 @@ public sealed partial class ChatCompletionMessageToolCall
         /// <summary>
         /// The type of the tool. Currently, only `function` is supported.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ChatCompletionMessageToolCallType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.ChatCompletionMessageToolCallType Type { get; set; }
 
         /// <summary>
         /// The function that the model called.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionNamedToolChoice.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionNamedToolChoice.g.verified.cs
index 779397bc47..49825ea748 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionNamedToolChoice.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionNamedToolChoice.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class ChatCompletionNamedToolChoice
         /// <summary>
         /// The type of the tool. Currently, only `function` is supported.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ChatCompletionNamedToolChoiceType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.ChatCompletionNamedToolChoiceType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionRequestAssistantMessage.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionRequestAssistantMessage.g.verified.cs
index 12fbead5ad..f00cd5ea15 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionRequestAssistantMessage.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionRequestAssistantMessage.g.verified.cs
@@ -26,8 +26,8 @@ public sealed partial class ChatCompletionRequestAssistantMessage
         /// <summary>
         /// The role of the messages author, in this case `assistant`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("role", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ChatCompletionRequestAssistantMessageRole Role { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("role")]
+        public global::G.ChatCompletionRequestAssistantMessageRole Role { get; set; }
 
         /// <summary>
         /// An optional name for the participant. Provides the model information to differentiate between participants of the same role.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionRequestFunctionMessage.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionRequestFunctionMessage.g.verified.cs
index 05e2dd23e2..6e8bcd0af3 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionRequestFunctionMessage.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionRequestFunctionMessage.g.verified.cs
@@ -13,9 +13,9 @@ public sealed partial class ChatCompletionRequestFunctionMessage
         /// <summary>
         /// The role of the messages author, in this case `function`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("role", Required = global::Newtonsoft.Json.Required.Always)]
+        [global::Newtonsoft.Json.JsonProperty("role")]
         [global::System.Obsolete("This property marked as deprecated.")]
-        public global::G.ChatCompletionRequestFunctionMessageRole Role { get; set; } = default!;
+        public global::G.ChatCompletionRequestFunctionMessageRole Role { get; set; }
 
         /// <summary>
         /// The contents of the function message.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionRequestMessageContentPartImage.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionRequestMessageContentPartImage.g.verified.cs
index 3250c93866..7dbc654012 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionRequestMessageContentPartImage.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionRequestMessageContentPartImage.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class ChatCompletionRequestMessageContentPartImage
         /// <summary>
         /// The type of the content part.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ChatCompletionRequestMessageContentPartImageType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.ChatCompletionRequestMessageContentPartImageType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionRequestMessageContentPartRefusal.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionRequestMessageContentPartRefusal.g.verified.cs
index 0cc0621325..4fbee99d55 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionRequestMessageContentPartRefusal.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionRequestMessageContentPartRefusal.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class ChatCompletionRequestMessageContentPartRefusal
         /// <summary>
         /// The type of the content part.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ChatCompletionRequestMessageContentPartRefusalType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.ChatCompletionRequestMessageContentPartRefusalType Type { get; set; }
 
         /// <summary>
         /// The refusal message generated by the model.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionRequestMessageContentPartText.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionRequestMessageContentPartText.g.verified.cs
index 4a085bac2f..4f2968abfa 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionRequestMessageContentPartText.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionRequestMessageContentPartText.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class ChatCompletionRequestMessageContentPartText
         /// <summary>
         /// The type of the content part.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ChatCompletionRequestMessageContentPartTextType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.ChatCompletionRequestMessageContentPartTextType Type { get; set; }
 
         /// <summary>
         /// The text content.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionRequestSystemMessage.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionRequestSystemMessage.g.verified.cs
index 9a004c921e..1c855081dd 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionRequestSystemMessage.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionRequestSystemMessage.g.verified.cs
@@ -20,8 +20,8 @@ public sealed partial class ChatCompletionRequestSystemMessage
         /// <summary>
         /// The role of the messages author, in this case `system`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("role", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ChatCompletionRequestSystemMessageRole Role { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("role")]
+        public global::G.ChatCompletionRequestSystemMessageRole Role { get; set; }
 
         /// <summary>
         /// An optional name for the participant. Provides the model information to differentiate between participants of the same role.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionRequestToolMessage.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionRequestToolMessage.g.verified.cs
index 907ec805be..5f721910d9 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionRequestToolMessage.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionRequestToolMessage.g.verified.cs
@@ -14,8 +14,8 @@ public sealed partial class ChatCompletionRequestToolMessage
         /// <summary>
         /// The role of the messages author, in this case `tool`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("role", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ChatCompletionRequestToolMessageRole Role { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("role")]
+        public global::G.ChatCompletionRequestToolMessageRole Role { get; set; }
 
         /// <summary>
         /// The contents of the tool message.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionRequestUserMessage.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionRequestUserMessage.g.verified.cs
index 0d9fe59918..842280af86 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionRequestUserMessage.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionRequestUserMessage.g.verified.cs
@@ -20,8 +20,8 @@ public sealed partial class ChatCompletionRequestUserMessage
         /// <summary>
         /// The role of the messages author, in this case `user`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("role", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ChatCompletionRequestUserMessageRole Role { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("role")]
+        public global::G.ChatCompletionRequestUserMessageRole Role { get; set; }
 
         /// <summary>
         /// An optional name for the participant. Provides the model information to differentiate between participants of the same role.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionResponseMessage.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionResponseMessage.g.verified.cs
index 0c0b1d7838..3a1055f221 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionResponseMessage.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionResponseMessage.g.verified.cs
@@ -30,8 +30,8 @@ public sealed partial class ChatCompletionResponseMessage
         /// <summary>
         /// The role of the author of this message.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("role", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ChatCompletionResponseMessageRole Role { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("role")]
+        public global::G.ChatCompletionResponseMessageRole Role { get; set; }
 
         /// <summary>
         /// Deprecated and replaced by `tool_calls`. The name and arguments of a function that should be called, as generated by the model.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionTool.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionTool.g.verified.cs
index ec19b24920..b0f79024d3 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionTool.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ChatCompletionTool.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class ChatCompletionTool
         /// <summary>
         /// The type of the tool. Currently, only `function` is supported.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ChatCompletionToolType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.ChatCompletionToolType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.CreateAssistantRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant1.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.CreateAssistantRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant1.g.verified.cs
index 3d7348fe5a..61171a42a0 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.CreateAssistantRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant1.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.CreateAssistantRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant1.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class CreateAssistantRequestToolResourcesFileSearchVectorS
         /// <summary>
         /// Always `auto`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.CreateAssistantRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant1Type Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.CreateAssistantRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant1Type Type { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.CreateAssistantRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant2.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.CreateAssistantRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant2.g.verified.cs
index 02dac94257..2d230ffb8f 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.CreateAssistantRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant2.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.CreateAssistantRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant2.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class CreateAssistantRequestToolResourcesFileSearchVectorS
         /// <summary>
         /// Always `static`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.CreateAssistantRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant2Type Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.CreateAssistantRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant2Type Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.CreateBatchRequest.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.CreateBatchRequest.g.verified.cs
index 4a4c6047a2..934f0f2342 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.CreateBatchRequest.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.CreateBatchRequest.g.verified.cs
@@ -26,8 +26,8 @@ public sealed partial class CreateBatchRequest
         /// <summary>
         /// The time frame within which the batch should be processed. Currently only `24h` is supported.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("completion_window", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.CreateBatchRequestCompletionWindow CompletionWindow { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("completion_window")]
+        public global::G.CreateBatchRequestCompletionWindow CompletionWindow { get; set; }
 
         /// <summary>
         /// Optional custom metadata for the batch.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.CreateChatCompletionFunctionResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.CreateChatCompletionFunctionResponse.g.verified.cs
index e042f04155..dec6d75191 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.CreateChatCompletionFunctionResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.CreateChatCompletionFunctionResponse.g.verified.cs
@@ -43,8 +43,8 @@ public sealed partial class CreateChatCompletionFunctionResponse
         /// <summary>
         /// The object type, which is always `chat.completion`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.CreateChatCompletionFunctionResponseObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.CreateChatCompletionFunctionResponseObject Object { get; set; }
 
         /// <summary>
         /// Usage statistics for the completion request.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.CreateChatCompletionResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.CreateChatCompletionResponse.g.verified.cs
index f938ad6f4b..72db0ba637 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.CreateChatCompletionResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.CreateChatCompletionResponse.g.verified.cs
@@ -50,8 +50,8 @@ public sealed partial class CreateChatCompletionResponse
         /// <summary>
         /// The object type, which is always `chat.completion`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.CreateChatCompletionResponseObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.CreateChatCompletionResponseObject Object { get; set; }
 
         /// <summary>
         /// Usage statistics for the completion request.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.CreateChatCompletionStreamResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.CreateChatCompletionStreamResponse.g.verified.cs
index a495ce383d..255ca8780a 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.CreateChatCompletionStreamResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.CreateChatCompletionStreamResponse.g.verified.cs
@@ -51,8 +51,8 @@ public sealed partial class CreateChatCompletionStreamResponse
         /// <summary>
         /// The object type, which is always `chat.completion.chunk`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.CreateChatCompletionStreamResponseObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.CreateChatCompletionStreamResponseObject Object { get; set; }
 
         /// <summary>
         /// An optional field that will only be present when you set `stream_options: {"include_usage": true}` in your request.<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.CreateCompletionResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.CreateCompletionResponse.g.verified.cs
index 5063ffbccf..fc963b92b2 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.CreateCompletionResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.CreateCompletionResponse.g.verified.cs
@@ -43,8 +43,8 @@ public sealed partial class CreateCompletionResponse
         /// <summary>
         /// The object type, which is always "text_completion"
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.CreateCompletionResponseObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.CreateCompletionResponseObject Object { get; set; }
 
         /// <summary>
         /// Usage statistics for the completion request.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.CreateEmbeddingResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.CreateEmbeddingResponse.g.verified.cs
index 442e147aec..16e627edb9 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.CreateEmbeddingResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.CreateEmbeddingResponse.g.verified.cs
@@ -24,8 +24,8 @@ public sealed partial class CreateEmbeddingResponse
         /// <summary>
         /// The object type, which is always "list".
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.CreateEmbeddingResponseObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.CreateEmbeddingResponseObject Object { get; set; }
 
         /// <summary>
         /// The usage information for the request.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.CreateThreadRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant1.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.CreateThreadRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant1.g.verified.cs
index 64f656b856..860251d3ba 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.CreateThreadRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant1.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.CreateThreadRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant1.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class CreateThreadRequestToolResourcesFileSearchVectorStor
         /// <summary>
         /// Always `auto`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.CreateThreadRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant1Type Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.CreateThreadRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant1Type Type { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.CreateThreadRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant2.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.CreateThreadRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant2.g.verified.cs
index 525646a9c4..fc4805c791 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.CreateThreadRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant2.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.CreateThreadRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant2.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class CreateThreadRequestToolResourcesFileSearchVectorStor
         /// <summary>
         /// Always `static`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.CreateThreadRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant2Type Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.CreateThreadRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant2Type Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.DeleteAssistantResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.DeleteAssistantResponse.g.verified.cs
index f52545a4d3..a0e6883e10 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.DeleteAssistantResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.DeleteAssistantResponse.g.verified.cs
@@ -24,8 +24,8 @@ public sealed partial class DeleteAssistantResponse
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.DeleteAssistantResponseObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.DeleteAssistantResponseObject Object { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.DeleteFileResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.DeleteFileResponse.g.verified.cs
index 9e0f38768c..8110e72532 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.DeleteFileResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.DeleteFileResponse.g.verified.cs
@@ -18,8 +18,8 @@ public sealed partial class DeleteFileResponse
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.DeleteFileResponseObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.DeleteFileResponseObject Object { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.DeleteMessageResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.DeleteMessageResponse.g.verified.cs
index c502d2cb8a..170edb990d 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.DeleteMessageResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.DeleteMessageResponse.g.verified.cs
@@ -24,8 +24,8 @@ public sealed partial class DeleteMessageResponse
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.DeleteMessageResponseObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.DeleteMessageResponseObject Object { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.DeleteThreadResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.DeleteThreadResponse.g.verified.cs
index e46e3660d0..4610556392 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.DeleteThreadResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.DeleteThreadResponse.g.verified.cs
@@ -24,8 +24,8 @@ public sealed partial class DeleteThreadResponse
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.DeleteThreadResponseObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.DeleteThreadResponseObject Object { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.DeleteVectorStoreFileResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.DeleteVectorStoreFileResponse.g.verified.cs
index e897dff5ea..f9639431be 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.DeleteVectorStoreFileResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.DeleteVectorStoreFileResponse.g.verified.cs
@@ -24,8 +24,8 @@ public sealed partial class DeleteVectorStoreFileResponse
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.DeleteVectorStoreFileResponseObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.DeleteVectorStoreFileResponseObject Object { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.DeleteVectorStoreResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.DeleteVectorStoreResponse.g.verified.cs
index ca1f09b2a1..7199b90572 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.DeleteVectorStoreResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.DeleteVectorStoreResponse.g.verified.cs
@@ -24,8 +24,8 @@ public sealed partial class DeleteVectorStoreResponse
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.DeleteVectorStoreResponseObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.DeleteVectorStoreResponseObject Object { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.DoneEvent.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.DoneEvent.g.verified.cs
index 1befff8b14..dfdb1aef23 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.DoneEvent.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.DoneEvent.g.verified.cs
@@ -12,14 +12,14 @@ public sealed partial class DoneEvent
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("event", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.DoneEventEvent Event { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("event")]
+        public global::G.DoneEventEvent Event { get; set; }
 
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("data", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.DoneEventData Data { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("data")]
+        public global::G.DoneEventData Data { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.Embedding.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.Embedding.g.verified.cs
index e7c13276a0..023e2b5e1b 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.Embedding.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.Embedding.g.verified.cs
@@ -24,8 +24,8 @@ public sealed partial class Embedding
         /// <summary>
         /// The object type, which is always "embedding".
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.EmbeddingObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.EmbeddingObject Object { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ErrorEvent.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ErrorEvent.g.verified.cs
index 7485198f48..1199760172 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ErrorEvent.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ErrorEvent.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class ErrorEvent
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("event", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ErrorEventEvent Event { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("event")]
+        public global::G.ErrorEventEvent Event { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.FineTuningIntegration.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.FineTuningIntegration.g.verified.cs
index a3c188ab89..c1c86a5230 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.FineTuningIntegration.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.FineTuningIntegration.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class FineTuningIntegration
         /// <summary>
         /// The type of the integration being enabled for the fine-tuning job
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.FineTuningIntegrationType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.FineTuningIntegrationType Type { get; set; }
 
         /// <summary>
         /// The settings for your integration with Weights and Biases. This payload specifies the project that<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.FineTuningJob.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.FineTuningJob.g.verified.cs
index 7c8bec7069..592385ea9b 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.FineTuningJob.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.FineTuningJob.g.verified.cs
@@ -56,8 +56,8 @@ public sealed partial class FineTuningJob
         /// <summary>
         /// The object type, which is always "fine_tuning.job".
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.FineTuningJobObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.FineTuningJobObject Object { get; set; }
 
         /// <summary>
         /// The organization that owns the fine-tuning job.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.FineTuningJobCheckpoint.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.FineTuningJobCheckpoint.g.verified.cs
index 756a1cd5e0..e66c8f131d 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.FineTuningJobCheckpoint.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.FineTuningJobCheckpoint.g.verified.cs
@@ -48,8 +48,8 @@ public sealed partial class FineTuningJobCheckpoint
         /// <summary>
         /// The object type, which is always "fine_tuning.job.checkpoint".
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.FineTuningJobCheckpointObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.FineTuningJobCheckpointObject Object { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.FineTuningJobEvent.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.FineTuningJobEvent.g.verified.cs
index 956178865d..9bf75d1253 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.FineTuningJobEvent.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.FineTuningJobEvent.g.verified.cs
@@ -36,8 +36,8 @@ public sealed partial class FineTuningJobEvent
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.FineTuningJobEventObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.FineTuningJobEventObject Object { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.Invite.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.Invite.g.verified.cs
index 5626efda84..95bae147a2 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.Invite.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.Invite.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class Invite
         /// <summary>
         /// The object type, which is always `organization.invite`
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.InviteObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.InviteObject Object { get; set; }
 
         /// <summary>
         /// The identifier, which can be referenced in API endpoints
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.InviteDeleteResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.InviteDeleteResponse.g.verified.cs
index 7933885ffe..ffe3633eee 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.InviteDeleteResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.InviteDeleteResponse.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class InviteDeleteResponse
         /// <summary>
         /// The object type, which is always `organization.invite.deleted`
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.InviteDeleteResponseObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.InviteDeleteResponseObject Object { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.InviteListResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.InviteListResponse.g.verified.cs
index d035329d5b..1a85e13af4 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.InviteListResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.InviteListResponse.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class InviteListResponse
         /// <summary>
         /// The object type, which is always `list`
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.InviteListResponseObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.InviteListResponseObject Object { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ListAuditLogsResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ListAuditLogsResponse.g.verified.cs
index 6cd3f0e7be..10fa39ee91 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ListAuditLogsResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ListAuditLogsResponse.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class ListAuditLogsResponse
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ListAuditLogsResponseObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.ListAuditLogsResponseObject Object { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ListBatchesResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ListBatchesResponse.g.verified.cs
index 8d48c72758..e8d060e697 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ListBatchesResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ListBatchesResponse.g.verified.cs
@@ -36,8 +36,8 @@ public sealed partial class ListBatchesResponse
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ListBatchesResponseObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.ListBatchesResponseObject Object { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ListFilesResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ListFilesResponse.g.verified.cs
index b470ef2f88..1e775634af 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ListFilesResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ListFilesResponse.g.verified.cs
@@ -18,8 +18,8 @@ public sealed partial class ListFilesResponse
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ListFilesResponseObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.ListFilesResponseObject Object { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ListFineTuningJobCheckpointsResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ListFineTuningJobCheckpointsResponse.g.verified.cs
index c0dca9ef84..12d8f8cb14 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ListFineTuningJobCheckpointsResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ListFineTuningJobCheckpointsResponse.g.verified.cs
@@ -18,8 +18,8 @@ public sealed partial class ListFineTuningJobCheckpointsResponse
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ListFineTuningJobCheckpointsResponseObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.ListFineTuningJobCheckpointsResponseObject Object { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ListFineTuningJobEventsResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ListFineTuningJobEventsResponse.g.verified.cs
index 9af9e43e65..5d656ea8d4 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ListFineTuningJobEventsResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ListFineTuningJobEventsResponse.g.verified.cs
@@ -18,8 +18,8 @@ public sealed partial class ListFineTuningJobEventsResponse
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ListFineTuningJobEventsResponseObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.ListFineTuningJobEventsResponseObject Object { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ListModelsResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ListModelsResponse.g.verified.cs
index 8367e8331c..053270834b 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ListModelsResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ListModelsResponse.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class ListModelsResponse
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ListModelsResponseObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.ListModelsResponseObject Object { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ListPaginatedFineTuningJobsResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ListPaginatedFineTuningJobsResponse.g.verified.cs
index a60ffdadd5..0c0fb1aa4c 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ListPaginatedFineTuningJobsResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ListPaginatedFineTuningJobsResponse.g.verified.cs
@@ -24,8 +24,8 @@ public sealed partial class ListPaginatedFineTuningJobsResponse
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ListPaginatedFineTuningJobsResponseObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.ListPaginatedFineTuningJobsResponseObject Object { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageContentImageFileObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageContentImageFileObject.g.verified.cs
index 090a089457..b4e0b00cc6 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageContentImageFileObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageContentImageFileObject.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class MessageContentImageFileObject
         /// <summary>
         /// Always `image_file`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.MessageContentImageFileObjectType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.MessageContentImageFileObjectType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageContentImageUrlObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageContentImageUrlObject.g.verified.cs
index ccaab4d7ae..fce5ab5f2c 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageContentImageUrlObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageContentImageUrlObject.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class MessageContentImageUrlObject
         /// <summary>
         /// The type of the content part.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.MessageContentImageUrlObjectType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.MessageContentImageUrlObjectType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageContentRefusalObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageContentRefusalObject.g.verified.cs
index 13497a929d..fd6a7bb820 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageContentRefusalObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageContentRefusalObject.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class MessageContentRefusalObject
         /// <summary>
         /// Always `refusal`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.MessageContentRefusalObjectType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.MessageContentRefusalObjectType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageContentTextAnnotationsFileCitationObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageContentTextAnnotationsFileCitationObject.g.verified.cs
index fdc17c07d0..820ec15fa7 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageContentTextAnnotationsFileCitationObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageContentTextAnnotationsFileCitationObject.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class MessageContentTextAnnotationsFileCitationObject
         /// <summary>
         /// Always `file_citation`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.MessageContentTextAnnotationsFileCitationObjectType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.MessageContentTextAnnotationsFileCitationObjectType Type { get; set; }
 
         /// <summary>
         /// The text in the message content that needs to be replaced.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageContentTextAnnotationsFilePathObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageContentTextAnnotationsFilePathObject.g.verified.cs
index 33dc74d939..7326dc8b0b 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageContentTextAnnotationsFilePathObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageContentTextAnnotationsFilePathObject.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class MessageContentTextAnnotationsFilePathObject
         /// <summary>
         /// Always `file_path`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.MessageContentTextAnnotationsFilePathObjectType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.MessageContentTextAnnotationsFilePathObjectType Type { get; set; }
 
         /// <summary>
         /// The text in the message content that needs to be replaced.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageContentTextObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageContentTextObject.g.verified.cs
index ff891a0d31..6295a560e8 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageContentTextObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageContentTextObject.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class MessageContentTextObject
         /// <summary>
         /// Always `text`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.MessageContentTextObjectType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.MessageContentTextObjectType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageDeltaContentImageFileObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageDeltaContentImageFileObject.g.verified.cs
index c093e412c3..e3e7831c7f 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageDeltaContentImageFileObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageDeltaContentImageFileObject.g.verified.cs
@@ -18,8 +18,8 @@ public sealed partial class MessageDeltaContentImageFileObject
         /// <summary>
         /// Always `image_file`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.MessageDeltaContentImageFileObjectType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.MessageDeltaContentImageFileObjectType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageDeltaContentImageUrlObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageDeltaContentImageUrlObject.g.verified.cs
index 1ef38e0e8f..991ef3c7e1 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageDeltaContentImageUrlObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageDeltaContentImageUrlObject.g.verified.cs
@@ -18,8 +18,8 @@ public sealed partial class MessageDeltaContentImageUrlObject
         /// <summary>
         /// Always `image_url`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.MessageDeltaContentImageUrlObjectType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.MessageDeltaContentImageUrlObjectType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageDeltaContentRefusalObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageDeltaContentRefusalObject.g.verified.cs
index a2d746b7eb..2986260197 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageDeltaContentRefusalObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageDeltaContentRefusalObject.g.verified.cs
@@ -18,8 +18,8 @@ public sealed partial class MessageDeltaContentRefusalObject
         /// <summary>
         /// Always `refusal`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.MessageDeltaContentRefusalObjectType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.MessageDeltaContentRefusalObjectType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageDeltaContentTextAnnotationsFileCitationObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageDeltaContentTextAnnotationsFileCitationObject.g.verified.cs
index b9b0fe1c39..9285e5053d 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageDeltaContentTextAnnotationsFileCitationObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageDeltaContentTextAnnotationsFileCitationObject.g.verified.cs
@@ -18,8 +18,8 @@ public sealed partial class MessageDeltaContentTextAnnotationsFileCitationObject
         /// <summary>
         /// Always `file_citation`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.MessageDeltaContentTextAnnotationsFileCitationObjectType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.MessageDeltaContentTextAnnotationsFileCitationObjectType Type { get; set; }
 
         /// <summary>
         /// The text in the message content that needs to be replaced.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageDeltaContentTextAnnotationsFilePathObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageDeltaContentTextAnnotationsFilePathObject.g.verified.cs
index fd9e02193e..4e4117219c 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageDeltaContentTextAnnotationsFilePathObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageDeltaContentTextAnnotationsFilePathObject.g.verified.cs
@@ -18,8 +18,8 @@ public sealed partial class MessageDeltaContentTextAnnotationsFilePathObject
         /// <summary>
         /// Always `file_path`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.MessageDeltaContentTextAnnotationsFilePathObjectType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.MessageDeltaContentTextAnnotationsFilePathObjectType Type { get; set; }
 
         /// <summary>
         /// The text in the message content that needs to be replaced.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageDeltaContentTextObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageDeltaContentTextObject.g.verified.cs
index c53261eb9a..cd3d8762f7 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageDeltaContentTextObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageDeltaContentTextObject.g.verified.cs
@@ -18,8 +18,8 @@ public sealed partial class MessageDeltaContentTextObject
         /// <summary>
         /// Always `text`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.MessageDeltaContentTextObjectType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.MessageDeltaContentTextObjectType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageDeltaObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageDeltaObject.g.verified.cs
index dcfdbb1c0c..f93e8c8dae 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageDeltaObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageDeltaObject.g.verified.cs
@@ -18,8 +18,8 @@ public sealed partial class MessageDeltaObject
         /// <summary>
         /// The object type, which is always `thread.message.delta`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.MessageDeltaObjectObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.MessageDeltaObjectObject Object { get; set; }
 
         /// <summary>
         /// The delta containing the fields that have changed on the Message.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageObject.g.verified.cs
index bcaa58426a..20567a932e 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageObject.g.verified.cs
@@ -20,8 +20,8 @@ public sealed partial class MessageObject
         /// <summary>
         /// The object type, which is always `thread.message`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.MessageObjectObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.MessageObjectObject Object { get; set; }
 
         /// <summary>
         /// The Unix timestamp (in seconds) for when the message was created.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageRequestContentTextObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageRequestContentTextObject.g.verified.cs
index 8951d56b1c..7e74e2730f 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageRequestContentTextObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageRequestContentTextObject.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class MessageRequestContentTextObject
         /// <summary>
         /// Always `text`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.MessageRequestContentTextObjectType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.MessageRequestContentTextObjectType Type { get; set; }
 
         /// <summary>
         /// Text content to be sent to the model
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageStreamEventVariant1.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageStreamEventVariant1.g.verified.cs
index 40491ba991..a2d2d4d0bb 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageStreamEventVariant1.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageStreamEventVariant1.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class MessageStreamEventVariant1
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("event", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.MessageStreamEventVariant1Event Event { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("event")]
+        public global::G.MessageStreamEventVariant1Event Event { get; set; }
 
         /// <summary>
         /// Represents a message within a [thread](/docs/api-reference/threads).
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageStreamEventVariant2.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageStreamEventVariant2.g.verified.cs
index 394f56b1cf..394a518243 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageStreamEventVariant2.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageStreamEventVariant2.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class MessageStreamEventVariant2
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("event", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.MessageStreamEventVariant2Event Event { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("event")]
+        public global::G.MessageStreamEventVariant2Event Event { get; set; }
 
         /// <summary>
         /// Represents a message within a [thread](/docs/api-reference/threads).
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageStreamEventVariant3.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageStreamEventVariant3.g.verified.cs
index 08d2c7b557..1515aafb6c 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageStreamEventVariant3.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageStreamEventVariant3.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class MessageStreamEventVariant3
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("event", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.MessageStreamEventVariant3Event Event { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("event")]
+        public global::G.MessageStreamEventVariant3Event Event { get; set; }
 
         /// <summary>
         /// Represents a message delta i.e. any changed fields on a message during streaming.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageStreamEventVariant4.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageStreamEventVariant4.g.verified.cs
index 35571d64ec..037fde2771 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageStreamEventVariant4.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageStreamEventVariant4.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class MessageStreamEventVariant4
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("event", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.MessageStreamEventVariant4Event Event { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("event")]
+        public global::G.MessageStreamEventVariant4Event Event { get; set; }
 
         /// <summary>
         /// Represents a message within a [thread](/docs/api-reference/threads).
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageStreamEventVariant5.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageStreamEventVariant5.g.verified.cs
index faa14dde8f..d0ef7e942f 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageStreamEventVariant5.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.MessageStreamEventVariant5.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class MessageStreamEventVariant5
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("event", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.MessageStreamEventVariant5Event Event { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("event")]
+        public global::G.MessageStreamEventVariant5Event Event { get; set; }
 
         /// <summary>
         /// Represents a message within a [thread](/docs/api-reference/threads).
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.Model12.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.Model12.g.verified.cs
index 7039cba919..3bcc19af4e 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.Model12.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.Model12.g.verified.cs
@@ -24,8 +24,8 @@ public sealed partial class Model12
         /// <summary>
         /// The object type, which is always "model".
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ModelObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.ModelObject Object { get; set; }
 
         /// <summary>
         /// The organization that owns the model.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.OpenAIFile.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.OpenAIFile.g.verified.cs
index 1e21a058f3..956aa031d3 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.OpenAIFile.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.OpenAIFile.g.verified.cs
@@ -36,8 +36,8 @@ public sealed partial class OpenAIFile
         /// <summary>
         /// The object type, which is always `file`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.OpenAIFileObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.OpenAIFileObject Object { get; set; }
 
         /// <summary>
         /// The intended purpose of the file. Supported values are `assistants`, `assistants_output`, `batch`, `batch_output`, `fine-tune`, `fine-tune-results` and `vision`.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.OtherChunkingStrategyResponseParam.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.OtherChunkingStrategyResponseParam.g.verified.cs
index fa2441f2f3..9e4965a42d 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.OtherChunkingStrategyResponseParam.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.OtherChunkingStrategyResponseParam.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class OtherChunkingStrategyResponseParam
         /// <summary>
         /// Always `other`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.OtherChunkingStrategyResponseParamType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.OtherChunkingStrategyResponseParamType Type { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.Project.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.Project.g.verified.cs
index f8649cf962..d6606a447f 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.Project.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.Project.g.verified.cs
@@ -18,8 +18,8 @@ public sealed partial class Project
         /// <summary>
         /// The object type, which is always `organization.project`
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ProjectObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.ProjectObject Object { get; set; }
 
         /// <summary>
         /// The name of the project. This appears in reporting.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectApiKey.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectApiKey.g.verified.cs
index 7364ef22f5..22647e0f75 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectApiKey.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectApiKey.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class ProjectApiKey
         /// <summary>
         /// The object type, which is always `organization.project.api_key`
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ProjectApiKeyObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.ProjectApiKeyObject Object { get; set; }
 
         /// <summary>
         /// The redacted value of the API key
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectApiKeyDeleteResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectApiKeyDeleteResponse.g.verified.cs
index 812c01ed73..7aed3f029e 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectApiKeyDeleteResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectApiKeyDeleteResponse.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class ProjectApiKeyDeleteResponse
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ProjectApiKeyDeleteResponseObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.ProjectApiKeyDeleteResponseObject Object { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectApiKeyListResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectApiKeyListResponse.g.verified.cs
index 664163cb5f..d2a18c0d15 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectApiKeyListResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectApiKeyListResponse.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class ProjectApiKeyListResponse
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ProjectApiKeyListResponseObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.ProjectApiKeyListResponseObject Object { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectListResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectListResponse.g.verified.cs
index a654a95471..0380d7a1a2 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectListResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectListResponse.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class ProjectListResponse
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ProjectListResponseObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.ProjectListResponseObject Object { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectServiceAccount.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectServiceAccount.g.verified.cs
index 071430a8c9..4c28b74ef8 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectServiceAccount.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectServiceAccount.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class ProjectServiceAccount
         /// <summary>
         /// The object type, which is always `organization.project.service_account`
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ProjectServiceAccountObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.ProjectServiceAccountObject Object { get; set; }
 
         /// <summary>
         /// The identifier, which can be referenced in API endpoints
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectServiceAccountApiKey.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectServiceAccountApiKey.g.verified.cs
index bd3a7ec7fb..ef72fe340e 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectServiceAccountApiKey.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectServiceAccountApiKey.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class ProjectServiceAccountApiKey
         /// <summary>
         /// The object type, which is always `organization.project.service_account.api_key`
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ProjectServiceAccountApiKeyObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.ProjectServiceAccountApiKeyObject Object { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectServiceAccountCreateResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectServiceAccountCreateResponse.g.verified.cs
index c4452cfaaa..35f686645b 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectServiceAccountCreateResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectServiceAccountCreateResponse.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class ProjectServiceAccountCreateResponse
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ProjectServiceAccountCreateResponseObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.ProjectServiceAccountCreateResponseObject Object { get; set; }
 
         /// <summary>
         /// 
@@ -30,8 +30,8 @@ public sealed partial class ProjectServiceAccountCreateResponse
         /// <summary>
         /// Service accounts can only have one role of type `member`
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("role", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ProjectServiceAccountCreateResponseRole Role { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("role")]
+        public global::G.ProjectServiceAccountCreateResponseRole Role { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectServiceAccountDeleteResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectServiceAccountDeleteResponse.g.verified.cs
index 30861b7cd8..b88befc8be 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectServiceAccountDeleteResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectServiceAccountDeleteResponse.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class ProjectServiceAccountDeleteResponse
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ProjectServiceAccountDeleteResponseObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.ProjectServiceAccountDeleteResponseObject Object { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectServiceAccountListResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectServiceAccountListResponse.g.verified.cs
index 5f2be05226..9ac05f404c 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectServiceAccountListResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectServiceAccountListResponse.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class ProjectServiceAccountListResponse
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ProjectServiceAccountListResponseObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.ProjectServiceAccountListResponseObject Object { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectUser.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectUser.g.verified.cs
index 278638f007..596b8005e0 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectUser.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectUser.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class ProjectUser
         /// <summary>
         /// The object type, which is always `organization.project.user`
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ProjectUserObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.ProjectUserObject Object { get; set; }
 
         /// <summary>
         /// The identifier, which can be referenced in API endpoints
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectUserDeleteResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectUserDeleteResponse.g.verified.cs
index d18c3b8186..4f11617aab 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectUserDeleteResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ProjectUserDeleteResponse.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class ProjectUserDeleteResponse
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ProjectUserDeleteResponseObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.ProjectUserDeleteResponseObject Object { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ResponseFormatJsonObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ResponseFormatJsonObject.g.verified.cs
index 3216ce2dd8..27eec85ed2 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ResponseFormatJsonObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ResponseFormatJsonObject.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class ResponseFormatJsonObject
         /// <summary>
         /// The type of response format being defined: `json_object`
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ResponseFormatJsonObjectType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.ResponseFormatJsonObjectType Type { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ResponseFormatJsonSchema.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ResponseFormatJsonSchema.g.verified.cs
index bc037dac2e..baff0e4400 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ResponseFormatJsonSchema.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ResponseFormatJsonSchema.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class ResponseFormatJsonSchema
         /// <summary>
         /// The type of response format being defined: `json_schema`
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ResponseFormatJsonSchemaType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.ResponseFormatJsonSchemaType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ResponseFormatText.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ResponseFormatText.g.verified.cs
index 5033acf8e4..1e4add1655 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ResponseFormatText.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ResponseFormatText.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class ResponseFormatText
         /// <summary>
         /// The type of response format being defined: `text`
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ResponseFormatTextType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.ResponseFormatTextType Type { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunObject.g.verified.cs
index 95f3d3a050..7b00b655bb 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunObject.g.verified.cs
@@ -20,8 +20,8 @@ public sealed partial class RunObject
         /// <summary>
         /// The object type, which is always `thread.run`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RunObjectObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.RunObjectObject Object { get; set; }
 
         /// <summary>
         /// The Unix timestamp (in seconds) for when the run was created.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunObjectRequiredAction.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunObjectRequiredAction.g.verified.cs
index a67e3d423e..a4b709586a 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunObjectRequiredAction.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunObjectRequiredAction.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class RunObjectRequiredAction
         /// <summary>
         /// For now, this is always `submit_tool_outputs`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RunObjectRequiredActionType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.RunObjectRequiredActionType Type { get; set; }
 
         /// <summary>
         /// Details on the tool outputs needed for this run to continue.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDeltaObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDeltaObject.g.verified.cs
index 27a7710042..6922e8df9a 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDeltaObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDeltaObject.g.verified.cs
@@ -18,8 +18,8 @@ public sealed partial class RunStepDeltaObject
         /// <summary>
         /// The object type, which is always `thread.run.step.delta`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RunStepDeltaObjectObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.RunStepDeltaObjectObject Object { get; set; }
 
         /// <summary>
         /// The delta containing the fields that have changed on the run step.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDeltaStepDetailsMessageCreationObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDeltaStepDetailsMessageCreationObject.g.verified.cs
index c610769204..93b592e238 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDeltaStepDetailsMessageCreationObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDeltaStepDetailsMessageCreationObject.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class RunStepDeltaStepDetailsMessageCreationObject
         /// <summary>
         /// Always `message_creation`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RunStepDeltaStepDetailsMessageCreationObjectType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.RunStepDeltaStepDetailsMessageCreationObjectType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDeltaStepDetailsToolCallsCodeObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDeltaStepDetailsToolCallsCodeObject.g.verified.cs
index c4b725afe6..080946182d 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDeltaStepDetailsToolCallsCodeObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDeltaStepDetailsToolCallsCodeObject.g.verified.cs
@@ -24,8 +24,8 @@ public sealed partial class RunStepDeltaStepDetailsToolCallsCodeObject
         /// <summary>
         /// The type of tool call. This is always going to be `code_interpreter` for this type of tool call.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RunStepDeltaStepDetailsToolCallsCodeObjectType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.RunStepDeltaStepDetailsToolCallsCodeObjectType Type { get; set; }
 
         /// <summary>
         /// The Code Interpreter tool call definition.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDeltaStepDetailsToolCallsCodeOutputImageObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDeltaStepDetailsToolCallsCodeOutputImageObject.g.verified.cs
index 44eb347a7d..634d6d859c 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDeltaStepDetailsToolCallsCodeOutputImageObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDeltaStepDetailsToolCallsCodeOutputImageObject.g.verified.cs
@@ -18,8 +18,8 @@ public sealed partial class RunStepDeltaStepDetailsToolCallsCodeOutputImageObjec
         /// <summary>
         /// Always `image`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RunStepDeltaStepDetailsToolCallsCodeOutputImageObjectType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.RunStepDeltaStepDetailsToolCallsCodeOutputImageObjectType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDeltaStepDetailsToolCallsCodeOutputLogsObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDeltaStepDetailsToolCallsCodeOutputLogsObject.g.verified.cs
index 33fdb47527..a9491ae7f1 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDeltaStepDetailsToolCallsCodeOutputLogsObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDeltaStepDetailsToolCallsCodeOutputLogsObject.g.verified.cs
@@ -18,8 +18,8 @@ public sealed partial class RunStepDeltaStepDetailsToolCallsCodeOutputLogsObject
         /// <summary>
         /// Always `logs`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RunStepDeltaStepDetailsToolCallsCodeOutputLogsObjectType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.RunStepDeltaStepDetailsToolCallsCodeOutputLogsObjectType Type { get; set; }
 
         /// <summary>
         /// The text output from the Code Interpreter tool call.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDeltaStepDetailsToolCallsFileSearchObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDeltaStepDetailsToolCallsFileSearchObject.g.verified.cs
index 6b5a258498..9d73a9e509 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDeltaStepDetailsToolCallsFileSearchObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDeltaStepDetailsToolCallsFileSearchObject.g.verified.cs
@@ -24,8 +24,8 @@ public sealed partial class RunStepDeltaStepDetailsToolCallsFileSearchObject
         /// <summary>
         /// The type of tool call. This is always going to be `file_search` for this type of tool call.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RunStepDeltaStepDetailsToolCallsFileSearchObjectType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.RunStepDeltaStepDetailsToolCallsFileSearchObjectType Type { get; set; }
 
         /// <summary>
         /// For now, this is always going to be an empty object.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDeltaStepDetailsToolCallsFunctionObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDeltaStepDetailsToolCallsFunctionObject.g.verified.cs
index 742d28045c..24e7fc4122 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDeltaStepDetailsToolCallsFunctionObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDeltaStepDetailsToolCallsFunctionObject.g.verified.cs
@@ -24,8 +24,8 @@ public sealed partial class RunStepDeltaStepDetailsToolCallsFunctionObject
         /// <summary>
         /// The type of tool call. This is always going to be `function` for this type of tool call.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RunStepDeltaStepDetailsToolCallsFunctionObjectType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.RunStepDeltaStepDetailsToolCallsFunctionObjectType Type { get; set; }
 
         /// <summary>
         /// The definition of the function that was called.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDeltaStepDetailsToolCallsObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDeltaStepDetailsToolCallsObject.g.verified.cs
index a779ed8227..f0cdb443cb 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDeltaStepDetailsToolCallsObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDeltaStepDetailsToolCallsObject.g.verified.cs
@@ -14,8 +14,8 @@ public sealed partial class RunStepDeltaStepDetailsToolCallsObject
         /// <summary>
         /// Always `tool_calls`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RunStepDeltaStepDetailsToolCallsObjectType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.RunStepDeltaStepDetailsToolCallsObjectType Type { get; set; }
 
         /// <summary>
         /// An array of tool calls the run step was involved in. These can be associated with one of three types of tools: `code_interpreter`, `file_search`, or `function`.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDetailsMessageCreationObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDetailsMessageCreationObject.g.verified.cs
index b5afd53ba6..105ee977b4 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDetailsMessageCreationObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDetailsMessageCreationObject.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class RunStepDetailsMessageCreationObject
         /// <summary>
         /// Always `message_creation`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RunStepDetailsMessageCreationObjectType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.RunStepDetailsMessageCreationObjectType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDetailsToolCallsCodeObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDetailsToolCallsCodeObject.g.verified.cs
index f60d7f9f05..9d8846aa65 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDetailsToolCallsCodeObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDetailsToolCallsCodeObject.g.verified.cs
@@ -18,8 +18,8 @@ public sealed partial class RunStepDetailsToolCallsCodeObject
         /// <summary>
         /// The type of tool call. This is always going to be `code_interpreter` for this type of tool call.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RunStepDetailsToolCallsCodeObjectType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.RunStepDetailsToolCallsCodeObjectType Type { get; set; }
 
         /// <summary>
         /// The Code Interpreter tool call definition.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDetailsToolCallsCodeOutputImageObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDetailsToolCallsCodeOutputImageObject.g.verified.cs
index c0ef7c1bb8..5f958860a8 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDetailsToolCallsCodeOutputImageObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDetailsToolCallsCodeOutputImageObject.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class RunStepDetailsToolCallsCodeOutputImageObject
         /// <summary>
         /// Always `image`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RunStepDetailsToolCallsCodeOutputImageObjectType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.RunStepDetailsToolCallsCodeOutputImageObjectType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDetailsToolCallsCodeOutputLogsObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDetailsToolCallsCodeOutputLogsObject.g.verified.cs
index ff9f66e1f6..2a63dbde06 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDetailsToolCallsCodeOutputLogsObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDetailsToolCallsCodeOutputLogsObject.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class RunStepDetailsToolCallsCodeOutputLogsObject
         /// <summary>
         /// Always `logs`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RunStepDetailsToolCallsCodeOutputLogsObjectType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.RunStepDetailsToolCallsCodeOutputLogsObjectType Type { get; set; }
 
         /// <summary>
         /// The text output from the Code Interpreter tool call.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDetailsToolCallsFileSearchObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDetailsToolCallsFileSearchObject.g.verified.cs
index a3045f6810..7ef0533d35 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDetailsToolCallsFileSearchObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDetailsToolCallsFileSearchObject.g.verified.cs
@@ -18,8 +18,8 @@ public sealed partial class RunStepDetailsToolCallsFileSearchObject
         /// <summary>
         /// The type of tool call. This is always going to be `file_search` for this type of tool call.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RunStepDetailsToolCallsFileSearchObjectType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.RunStepDetailsToolCallsFileSearchObjectType Type { get; set; }
 
         /// <summary>
         /// For now, this is always going to be an empty object.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDetailsToolCallsFunctionObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDetailsToolCallsFunctionObject.g.verified.cs
index 3063f9756b..e8335d6593 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDetailsToolCallsFunctionObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDetailsToolCallsFunctionObject.g.verified.cs
@@ -18,8 +18,8 @@ public sealed partial class RunStepDetailsToolCallsFunctionObject
         /// <summary>
         /// The type of tool call. This is always going to be `function` for this type of tool call.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RunStepDetailsToolCallsFunctionObjectType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.RunStepDetailsToolCallsFunctionObjectType Type { get; set; }
 
         /// <summary>
         /// The definition of the function that was called.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDetailsToolCallsObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDetailsToolCallsObject.g.verified.cs
index e904886291..aaf3c353e1 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDetailsToolCallsObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepDetailsToolCallsObject.g.verified.cs
@@ -14,8 +14,8 @@ public sealed partial class RunStepDetailsToolCallsObject
         /// <summary>
         /// Always `tool_calls`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RunStepDetailsToolCallsObjectType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.RunStepDetailsToolCallsObjectType Type { get; set; }
 
         /// <summary>
         /// An array of tool calls the run step was involved in. These can be associated with one of three types of tools: `code_interpreter`, `file_search`, or `function`.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepObject.g.verified.cs
index 596f98ccb6..492aff806e 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepObject.g.verified.cs
@@ -20,8 +20,8 @@ public sealed partial class RunStepObject
         /// <summary>
         /// The object type, which is always `thread.run.step`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RunStepObjectObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.RunStepObjectObject Object { get; set; }
 
         /// <summary>
         /// The Unix timestamp (in seconds) for when the run step was created.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepStreamEventVariant1.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepStreamEventVariant1.g.verified.cs
index 3c42303085..6759d874ce 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepStreamEventVariant1.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepStreamEventVariant1.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class RunStepStreamEventVariant1
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("event", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RunStepStreamEventVariant1Event Event { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("event")]
+        public global::G.RunStepStreamEventVariant1Event Event { get; set; }
 
         /// <summary>
         /// Represents a step in execution of a run.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepStreamEventVariant2.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepStreamEventVariant2.g.verified.cs
index a4dcd04b61..be2f37f226 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepStreamEventVariant2.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepStreamEventVariant2.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class RunStepStreamEventVariant2
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("event", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RunStepStreamEventVariant2Event Event { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("event")]
+        public global::G.RunStepStreamEventVariant2Event Event { get; set; }
 
         /// <summary>
         /// Represents a step in execution of a run.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepStreamEventVariant3.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepStreamEventVariant3.g.verified.cs
index 085d382c67..705a355042 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepStreamEventVariant3.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepStreamEventVariant3.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class RunStepStreamEventVariant3
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("event", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RunStepStreamEventVariant3Event Event { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("event")]
+        public global::G.RunStepStreamEventVariant3Event Event { get; set; }
 
         /// <summary>
         /// Represents a run step delta i.e. any changed fields on a run step during streaming.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepStreamEventVariant4.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepStreamEventVariant4.g.verified.cs
index 182c678fb7..67bb5102c9 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepStreamEventVariant4.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepStreamEventVariant4.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class RunStepStreamEventVariant4
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("event", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RunStepStreamEventVariant4Event Event { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("event")]
+        public global::G.RunStepStreamEventVariant4Event Event { get; set; }
 
         /// <summary>
         /// Represents a step in execution of a run.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepStreamEventVariant5.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepStreamEventVariant5.g.verified.cs
index 7521f20cc8..616a4b1b17 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepStreamEventVariant5.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepStreamEventVariant5.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class RunStepStreamEventVariant5
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("event", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RunStepStreamEventVariant5Event Event { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("event")]
+        public global::G.RunStepStreamEventVariant5Event Event { get; set; }
 
         /// <summary>
         /// Represents a step in execution of a run.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepStreamEventVariant6.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepStreamEventVariant6.g.verified.cs
index 42da40d092..3916e46dd3 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepStreamEventVariant6.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepStreamEventVariant6.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class RunStepStreamEventVariant6
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("event", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RunStepStreamEventVariant6Event Event { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("event")]
+        public global::G.RunStepStreamEventVariant6Event Event { get; set; }
 
         /// <summary>
         /// Represents a step in execution of a run.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepStreamEventVariant7.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepStreamEventVariant7.g.verified.cs
index abd9a555ca..6496d1c041 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepStreamEventVariant7.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStepStreamEventVariant7.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class RunStepStreamEventVariant7
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("event", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RunStepStreamEventVariant7Event Event { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("event")]
+        public global::G.RunStepStreamEventVariant7Event Event { get; set; }
 
         /// <summary>
         /// Represents a step in execution of a run.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStreamEventVariant1.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStreamEventVariant1.g.verified.cs
index 6c12427f38..a98c9b233b 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStreamEventVariant1.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStreamEventVariant1.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class RunStreamEventVariant1
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("event", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RunStreamEventVariant1Event Event { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("event")]
+        public global::G.RunStreamEventVariant1Event Event { get; set; }
 
         /// <summary>
         /// Represents an execution run on a [thread](/docs/api-reference/threads).
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStreamEventVariant10.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStreamEventVariant10.g.verified.cs
index 78c4b8e355..9f2f2b3ac9 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStreamEventVariant10.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStreamEventVariant10.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class RunStreamEventVariant10
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("event", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RunStreamEventVariant10Event Event { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("event")]
+        public global::G.RunStreamEventVariant10Event Event { get; set; }
 
         /// <summary>
         /// Represents an execution run on a [thread](/docs/api-reference/threads).
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStreamEventVariant2.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStreamEventVariant2.g.verified.cs
index 80534a8974..ccebb60655 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStreamEventVariant2.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStreamEventVariant2.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class RunStreamEventVariant2
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("event", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RunStreamEventVariant2Event Event { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("event")]
+        public global::G.RunStreamEventVariant2Event Event { get; set; }
 
         /// <summary>
         /// Represents an execution run on a [thread](/docs/api-reference/threads).
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStreamEventVariant3.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStreamEventVariant3.g.verified.cs
index 220415616f..352717728c 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStreamEventVariant3.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStreamEventVariant3.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class RunStreamEventVariant3
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("event", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RunStreamEventVariant3Event Event { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("event")]
+        public global::G.RunStreamEventVariant3Event Event { get; set; }
 
         /// <summary>
         /// Represents an execution run on a [thread](/docs/api-reference/threads).
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStreamEventVariant4.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStreamEventVariant4.g.verified.cs
index 790e794f88..27f66e7f13 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStreamEventVariant4.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStreamEventVariant4.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class RunStreamEventVariant4
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("event", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RunStreamEventVariant4Event Event { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("event")]
+        public global::G.RunStreamEventVariant4Event Event { get; set; }
 
         /// <summary>
         /// Represents an execution run on a [thread](/docs/api-reference/threads).
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStreamEventVariant5.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStreamEventVariant5.g.verified.cs
index 76262de074..cafe758a7d 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStreamEventVariant5.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStreamEventVariant5.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class RunStreamEventVariant5
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("event", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RunStreamEventVariant5Event Event { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("event")]
+        public global::G.RunStreamEventVariant5Event Event { get; set; }
 
         /// <summary>
         /// Represents an execution run on a [thread](/docs/api-reference/threads).
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStreamEventVariant6.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStreamEventVariant6.g.verified.cs
index a45355d9f6..40af3e0ee1 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStreamEventVariant6.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStreamEventVariant6.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class RunStreamEventVariant6
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("event", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RunStreamEventVariant6Event Event { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("event")]
+        public global::G.RunStreamEventVariant6Event Event { get; set; }
 
         /// <summary>
         /// Represents an execution run on a [thread](/docs/api-reference/threads).
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStreamEventVariant7.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStreamEventVariant7.g.verified.cs
index 994cfd2fda..2628e0bcff 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStreamEventVariant7.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStreamEventVariant7.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class RunStreamEventVariant7
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("event", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RunStreamEventVariant7Event Event { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("event")]
+        public global::G.RunStreamEventVariant7Event Event { get; set; }
 
         /// <summary>
         /// Represents an execution run on a [thread](/docs/api-reference/threads).
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStreamEventVariant8.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStreamEventVariant8.g.verified.cs
index e3e92d929a..6f80df8bb4 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStreamEventVariant8.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStreamEventVariant8.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class RunStreamEventVariant8
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("event", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RunStreamEventVariant8Event Event { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("event")]
+        public global::G.RunStreamEventVariant8Event Event { get; set; }
 
         /// <summary>
         /// Represents an execution run on a [thread](/docs/api-reference/threads).
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStreamEventVariant9.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStreamEventVariant9.g.verified.cs
index 55e11c1b6c..4d81cafa23 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStreamEventVariant9.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunStreamEventVariant9.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class RunStreamEventVariant9
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("event", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RunStreamEventVariant9Event Event { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("event")]
+        public global::G.RunStreamEventVariant9Event Event { get; set; }
 
         /// <summary>
         /// Represents an execution run on a [thread](/docs/api-reference/threads).
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunToolCallObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunToolCallObject.g.verified.cs
index a0a47cbcb1..53ce1177e9 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunToolCallObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.RunToolCallObject.g.verified.cs
@@ -18,8 +18,8 @@ public sealed partial class RunToolCallObject
         /// <summary>
         /// The type of tool call the output is required for. For now, this is always `function`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.RunToolCallObjectType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.RunToolCallObjectType Type { get; set; }
 
         /// <summary>
         /// The function definition.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.StaticChunkingStrategyRequestParam.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.StaticChunkingStrategyRequestParam.g.verified.cs
index 660d7312be..445fa7423f 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.StaticChunkingStrategyRequestParam.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.StaticChunkingStrategyRequestParam.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class StaticChunkingStrategyRequestParam
         /// <summary>
         /// Always `static`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.StaticChunkingStrategyRequestParamType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.StaticChunkingStrategyRequestParamType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.StaticChunkingStrategyResponseParam.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.StaticChunkingStrategyResponseParam.g.verified.cs
index 0f4fa5b696..902e067367 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.StaticChunkingStrategyResponseParam.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.StaticChunkingStrategyResponseParam.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class StaticChunkingStrategyResponseParam
         /// <summary>
         /// Always `static`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.StaticChunkingStrategyResponseParamType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.StaticChunkingStrategyResponseParamType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ThreadObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ThreadObject.g.verified.cs
index 3bb3b0a14a..8208f674f9 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ThreadObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ThreadObject.g.verified.cs
@@ -18,8 +18,8 @@ public sealed partial class ThreadObject
         /// <summary>
         /// The object type, which is always `thread`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ThreadObjectObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.ThreadObjectObject Object { get; set; }
 
         /// <summary>
         /// The Unix timestamp (in seconds) for when the thread was created.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ThreadStreamEventVariant1.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ThreadStreamEventVariant1.g.verified.cs
index fd3e2b2377..4b31dab23c 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ThreadStreamEventVariant1.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.ThreadStreamEventVariant1.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class ThreadStreamEventVariant1
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("event", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ThreadStreamEventVariant1Event Event { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("event")]
+        public global::G.ThreadStreamEventVariant1Event Event { get; set; }
 
         /// <summary>
         /// Represents a thread that contains [messages](/docs/api-reference/messages).
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.UploadPart.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.UploadPart.g.verified.cs
index af9ff15bb6..2736cdb059 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.UploadPart.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.UploadPart.g.verified.cs
@@ -30,8 +30,8 @@ public sealed partial class UploadPart
         /// <summary>
         /// The object type, which is always `upload.part`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.UploadPartObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.UploadPartObject Object { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.User.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.User.g.verified.cs
index 95781d22ed..1ac92a7c4c 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.User.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.User.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class User
         /// <summary>
         /// The object type, which is always `organization.user`
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.UserObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.UserObject Object { get; set; }
 
         /// <summary>
         /// The identifier, which can be referenced in API endpoints
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.UserDeleteResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.UserDeleteResponse.g.verified.cs
index 1475627957..2c0c1173cb 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.UserDeleteResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.UserDeleteResponse.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class UserDeleteResponse
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.UserDeleteResponseObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.UserDeleteResponseObject Object { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.UserListResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.UserListResponse.g.verified.cs
index 8afa8426a7..2173ae3e75 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.UserListResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.UserListResponse.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class UserListResponse
         /// <summary>
         /// 
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.UserListResponseObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.UserListResponseObject Object { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.VectorStoreExpirationAfter.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.VectorStoreExpirationAfter.g.verified.cs
index 28c8ed124f..3478c65c1a 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.VectorStoreExpirationAfter.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.VectorStoreExpirationAfter.g.verified.cs
@@ -12,8 +12,8 @@ public sealed partial class VectorStoreExpirationAfter
         /// <summary>
         /// Anchor timestamp after which the expiration policy applies. Supported anchors: `last_active_at`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("anchor", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.VectorStoreExpirationAfterAnchor Anchor { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("anchor")]
+        public global::G.VectorStoreExpirationAfterAnchor Anchor { get; set; }
 
         /// <summary>
         /// The number of days after the anchor time that the vector store will expire.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.VectorStoreFileBatchObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.VectorStoreFileBatchObject.g.verified.cs
index d0afd81b58..61f83497a6 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.VectorStoreFileBatchObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.VectorStoreFileBatchObject.g.verified.cs
@@ -18,8 +18,8 @@ public sealed partial class VectorStoreFileBatchObject
         /// <summary>
         /// The object type, which is always `vector_store.file_batch`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.VectorStoreFileBatchObjectObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.VectorStoreFileBatchObjectObject Object { get; set; }
 
         /// <summary>
         /// The Unix timestamp (in seconds) for when the vector store files batch was created.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.VectorStoreFileObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.VectorStoreFileObject.g.verified.cs
index 190df198d2..f4483bc1aa 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.VectorStoreFileObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.VectorStoreFileObject.g.verified.cs
@@ -20,8 +20,8 @@ public sealed partial class VectorStoreFileObject
         /// <summary>
         /// The object type, which is always `vector_store.file`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.VectorStoreFileObjectObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.VectorStoreFileObjectObject Object { get; set; }
 
         /// <summary>
         /// The total vector store usage in bytes. Note that this may be different from the original file size.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.VectorStoreObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.VectorStoreObject.g.verified.cs
index b36879b365..e61a5a7f4a 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.VectorStoreObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/NewtonsoftJson/_#G.Models.VectorStoreObject.g.verified.cs
@@ -18,8 +18,8 @@ public sealed partial class VectorStoreObject
         /// <summary>
         /// The object type, which is always `vector_store`.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("object", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.VectorStoreObjectObject Object { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("object")]
+        public global::G.VectorStoreObjectObject Object { get; set; }
 
         /// <summary>
         /// The Unix timestamp (in seconds) for when the vector store was created.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.BatchClient.CreateBatch.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.BatchClient.CreateBatch.g.verified.cs
index 36c63d360b..17a0e24ff6 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.BatchClient.CreateBatch.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.BatchClient.CreateBatch.g.verified.cs
@@ -117,7 +117,7 @@ partial void ProcessCreateBatchResponseContent(
         public async global::System.Threading.Tasks.Task<global::G.Batch> CreateBatchAsync(
             string inputFileId,
             global::G.CreateBatchRequestEndpoint endpoint,
-            global::G.CreateBatchRequestCompletionWindow completionWindow,
+            global::G.CreateBatchRequestCompletionWindow completionWindow = default,
             global::G.CreateBatchRequestMetadata? metadata = default,
             global::System.Threading.CancellationToken cancellationToken = default)
         {
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.AssistantObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.AssistantObject.g.verified.cs
index 0f8e94bdda..e3f1f953bc 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.AssistantObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.AssistantObject.g.verified.cs
@@ -23,8 +23,7 @@ public sealed partial class AssistantObject
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.AssistantObjectObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.AssistantObjectObject Object { get; set; } = global::G.AssistantObjectObject.Assistant;
+        public global::G.AssistantObjectObject Object { get; set; }
 
         /// <summary>
         /// The Unix timestamp (in seconds) for when the assistant was created.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.AssistantToolsCode.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.AssistantToolsCode.g.verified.cs
index a7517f7c18..f2edf67905 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.AssistantToolsCode.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.AssistantToolsCode.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class AssistantToolsCode
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.AssistantToolsCodeTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.AssistantToolsCodeType Type { get; set; } = global::G.AssistantToolsCodeType.CodeInterpreter;
+        public global::G.AssistantToolsCodeType Type { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.AssistantToolsFileSearch.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.AssistantToolsFileSearch.g.verified.cs
index dd81f75438..3edd0b2450 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.AssistantToolsFileSearch.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.AssistantToolsFileSearch.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class AssistantToolsFileSearch
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.AssistantToolsFileSearchTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.AssistantToolsFileSearchType Type { get; set; } = global::G.AssistantToolsFileSearchType.FileSearch;
+        public global::G.AssistantToolsFileSearchType Type { get; set; }
 
         /// <summary>
         /// Overrides for the file search tool.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.AssistantToolsFileSearchTypeOnly.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.AssistantToolsFileSearchTypeOnly.g.verified.cs
index 047b8a5b6f..488e9c3662 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.AssistantToolsFileSearchTypeOnly.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.AssistantToolsFileSearchTypeOnly.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class AssistantToolsFileSearchTypeOnly
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.AssistantToolsFileSearchTypeOnlyTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.AssistantToolsFileSearchTypeOnlyType Type { get; set; } = global::G.AssistantToolsFileSearchTypeOnlyType.FileSearch;
+        public global::G.AssistantToolsFileSearchTypeOnlyType Type { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.AssistantToolsFunction.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.AssistantToolsFunction.g.verified.cs
index dbf58d08db..00a6eef8b7 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.AssistantToolsFunction.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.AssistantToolsFunction.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class AssistantToolsFunction
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.AssistantToolsFunctionTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.AssistantToolsFunctionType Type { get; set; } = global::G.AssistantToolsFunctionType.Function;
+        public global::G.AssistantToolsFunctionType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.AutoChunkingStrategyRequestParam.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.AutoChunkingStrategyRequestParam.g.verified.cs
index f06a6a1237..02476d92e9 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.AutoChunkingStrategyRequestParam.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.AutoChunkingStrategyRequestParam.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class AutoChunkingStrategyRequestParam
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.AutoChunkingStrategyRequestParamTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.AutoChunkingStrategyRequestParamType Type { get; set; } = global::G.AutoChunkingStrategyRequestParamType.Auto;
+        public global::G.AutoChunkingStrategyRequestParamType Type { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.Batch.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.Batch.g.verified.cs
index 6b6c81e888..15f924f47f 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.Batch.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.Batch.g.verified.cs
@@ -21,8 +21,7 @@ public sealed partial class Batch
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.BatchObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.BatchObject Object { get; set; } = global::G.BatchObject.Batch;
+        public global::G.BatchObject Object { get; set; }
 
         /// <summary>
         /// The OpenAI API endpoint used by the batch.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionMessageToolCall.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionMessageToolCall.g.verified.cs
index 657911eb04..d0a5730dfb 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionMessageToolCall.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionMessageToolCall.g.verified.cs
@@ -21,8 +21,7 @@ public sealed partial class ChatCompletionMessageToolCall
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ChatCompletionMessageToolCallTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ChatCompletionMessageToolCallType Type { get; set; } = global::G.ChatCompletionMessageToolCallType.Function;
+        public global::G.ChatCompletionMessageToolCallType Type { get; set; }
 
         /// <summary>
         /// The function that the model called.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionNamedToolChoice.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionNamedToolChoice.g.verified.cs
index 88fcfa842a..9cbde4b994 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionNamedToolChoice.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionNamedToolChoice.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class ChatCompletionNamedToolChoice
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ChatCompletionNamedToolChoiceTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ChatCompletionNamedToolChoiceType Type { get; set; } = global::G.ChatCompletionNamedToolChoiceType.Function;
+        public global::G.ChatCompletionNamedToolChoiceType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionRequestAssistantMessage.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionRequestAssistantMessage.g.verified.cs
index e8cf15af4f..c328ecba72 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionRequestAssistantMessage.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionRequestAssistantMessage.g.verified.cs
@@ -29,8 +29,7 @@ public sealed partial class ChatCompletionRequestAssistantMessage
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("role")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ChatCompletionRequestAssistantMessageRoleJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ChatCompletionRequestAssistantMessageRole Role { get; set; } = global::G.ChatCompletionRequestAssistantMessageRole.Assistant;
+        public global::G.ChatCompletionRequestAssistantMessageRole Role { get; set; }
 
         /// <summary>
         /// An optional name for the participant. Provides the model information to differentiate between participants of the same role.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionRequestFunctionMessage.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionRequestFunctionMessage.g.verified.cs
index 3ee313f96e..e0b5f92005 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionRequestFunctionMessage.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionRequestFunctionMessage.g.verified.cs
@@ -15,9 +15,8 @@ public sealed partial class ChatCompletionRequestFunctionMessage
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("role")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ChatCompletionRequestFunctionMessageRoleJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
         [global::System.Obsolete("This property marked as deprecated.")]
-        public required global::G.ChatCompletionRequestFunctionMessageRole Role { get; set; } = global::G.ChatCompletionRequestFunctionMessageRole.Function;
+        public global::G.ChatCompletionRequestFunctionMessageRole Role { get; set; }
 
         /// <summary>
         /// The contents of the function message.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionRequestMessageContentPartImage.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionRequestMessageContentPartImage.g.verified.cs
index 6dbc2aea89..0bb9ff1dd0 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionRequestMessageContentPartImage.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionRequestMessageContentPartImage.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class ChatCompletionRequestMessageContentPartImage
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ChatCompletionRequestMessageContentPartImageTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ChatCompletionRequestMessageContentPartImageType Type { get; set; } = global::G.ChatCompletionRequestMessageContentPartImageType.ImageUrl;
+        public global::G.ChatCompletionRequestMessageContentPartImageType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionRequestMessageContentPartRefusal.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionRequestMessageContentPartRefusal.g.verified.cs
index 620b6ffd58..04a60b9816 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionRequestMessageContentPartRefusal.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionRequestMessageContentPartRefusal.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class ChatCompletionRequestMessageContentPartRefusal
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ChatCompletionRequestMessageContentPartRefusalTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ChatCompletionRequestMessageContentPartRefusalType Type { get; set; } = global::G.ChatCompletionRequestMessageContentPartRefusalType.Refusal;
+        public global::G.ChatCompletionRequestMessageContentPartRefusalType Type { get; set; }
 
         /// <summary>
         /// The refusal message generated by the model.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionRequestMessageContentPartText.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionRequestMessageContentPartText.g.verified.cs
index 0f781d9e35..7b57bd1df1 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionRequestMessageContentPartText.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionRequestMessageContentPartText.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class ChatCompletionRequestMessageContentPartText
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ChatCompletionRequestMessageContentPartTextTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ChatCompletionRequestMessageContentPartTextType Type { get; set; } = global::G.ChatCompletionRequestMessageContentPartTextType.Text;
+        public global::G.ChatCompletionRequestMessageContentPartTextType Type { get; set; }
 
         /// <summary>
         /// The text content.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionRequestSystemMessage.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionRequestSystemMessage.g.verified.cs
index 1c1ed72ce1..802ebc516e 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionRequestSystemMessage.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionRequestSystemMessage.g.verified.cs
@@ -24,8 +24,7 @@ public sealed partial class ChatCompletionRequestSystemMessage
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("role")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ChatCompletionRequestSystemMessageRoleJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ChatCompletionRequestSystemMessageRole Role { get; set; } = global::G.ChatCompletionRequestSystemMessageRole.System;
+        public global::G.ChatCompletionRequestSystemMessageRole Role { get; set; }
 
         /// <summary>
         /// An optional name for the participant. Provides the model information to differentiate between participants of the same role.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionRequestToolMessage.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionRequestToolMessage.g.verified.cs
index 039c3334fd..4f52747912 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionRequestToolMessage.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionRequestToolMessage.g.verified.cs
@@ -16,8 +16,7 @@ public sealed partial class ChatCompletionRequestToolMessage
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("role")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ChatCompletionRequestToolMessageRoleJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ChatCompletionRequestToolMessageRole Role { get; set; } = global::G.ChatCompletionRequestToolMessageRole.Tool;
+        public global::G.ChatCompletionRequestToolMessageRole Role { get; set; }
 
         /// <summary>
         /// The contents of the tool message.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionRequestUserMessage.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionRequestUserMessage.g.verified.cs
index ec9d389f67..9a2314d41b 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionRequestUserMessage.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionRequestUserMessage.g.verified.cs
@@ -24,8 +24,7 @@ public sealed partial class ChatCompletionRequestUserMessage
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("role")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ChatCompletionRequestUserMessageRoleJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ChatCompletionRequestUserMessageRole Role { get; set; } = global::G.ChatCompletionRequestUserMessageRole.User;
+        public global::G.ChatCompletionRequestUserMessageRole Role { get; set; }
 
         /// <summary>
         /// An optional name for the participant. Provides the model information to differentiate between participants of the same role.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionResponseMessage.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionResponseMessage.g.verified.cs
index e2ccb8d3bf..e245e57187 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionResponseMessage.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionResponseMessage.g.verified.cs
@@ -34,8 +34,7 @@ public sealed partial class ChatCompletionResponseMessage
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("role")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ChatCompletionResponseMessageRoleJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ChatCompletionResponseMessageRole Role { get; set; } = global::G.ChatCompletionResponseMessageRole.Assistant;
+        public global::G.ChatCompletionResponseMessageRole Role { get; set; }
 
         /// <summary>
         /// Deprecated and replaced by `tool_calls`. The name and arguments of a function that should be called, as generated by the model.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionTool.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionTool.g.verified.cs
index 61f34b2cf1..bfe0b76b97 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionTool.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ChatCompletionTool.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class ChatCompletionTool
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ChatCompletionToolTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ChatCompletionToolType Type { get; set; } = global::G.ChatCompletionToolType.Function;
+        public global::G.ChatCompletionToolType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.CreateAssistantRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant1.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.CreateAssistantRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant1.g.verified.cs
index 340f3db791..92e07c0920 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.CreateAssistantRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant1.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.CreateAssistantRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant1.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class CreateAssistantRequestToolResourcesFileSearchVectorS
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.CreateAssistantRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant1TypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.CreateAssistantRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant1Type Type { get; set; } = global::G.CreateAssistantRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant1Type.Auto;
+        public global::G.CreateAssistantRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant1Type Type { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.CreateAssistantRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant2.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.CreateAssistantRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant2.g.verified.cs
index 38cff0437d..a9aaaafa93 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.CreateAssistantRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant2.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.CreateAssistantRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant2.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class CreateAssistantRequestToolResourcesFileSearchVectorS
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.CreateAssistantRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant2TypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.CreateAssistantRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant2Type Type { get; set; } = global::G.CreateAssistantRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant2Type.Static;
+        public global::G.CreateAssistantRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant2Type Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.CreateBatchRequest.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.CreateBatchRequest.g.verified.cs
index 9efdff61be..912234e92b 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.CreateBatchRequest.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.CreateBatchRequest.g.verified.cs
@@ -31,8 +31,7 @@ public sealed partial class CreateBatchRequest
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("completion_window")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.CreateBatchRequestCompletionWindowJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.CreateBatchRequestCompletionWindow CompletionWindow { get; set; } = global::G.CreateBatchRequestCompletionWindow.x24h;
+        public global::G.CreateBatchRequestCompletionWindow CompletionWindow { get; set; }
 
         /// <summary>
         /// Optional custom metadata for the batch.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.CreateChatCompletionFunctionResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.CreateChatCompletionFunctionResponse.g.verified.cs
index 37d7debca8..f05fd45aad 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.CreateChatCompletionFunctionResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.CreateChatCompletionFunctionResponse.g.verified.cs
@@ -49,8 +49,7 @@ public sealed partial class CreateChatCompletionFunctionResponse
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.CreateChatCompletionFunctionResponseObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.CreateChatCompletionFunctionResponseObject Object { get; set; } = global::G.CreateChatCompletionFunctionResponseObject.ChatCompletion;
+        public global::G.CreateChatCompletionFunctionResponseObject Object { get; set; }
 
         /// <summary>
         /// Usage statistics for the completion request.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.CreateChatCompletionResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.CreateChatCompletionResponse.g.verified.cs
index 0806e84b21..fabdb9a6c2 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.CreateChatCompletionResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.CreateChatCompletionResponse.g.verified.cs
@@ -57,8 +57,7 @@ public sealed partial class CreateChatCompletionResponse
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.CreateChatCompletionResponseObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.CreateChatCompletionResponseObject Object { get; set; } = global::G.CreateChatCompletionResponseObject.ChatCompletion;
+        public global::G.CreateChatCompletionResponseObject Object { get; set; }
 
         /// <summary>
         /// Usage statistics for the completion request.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.CreateChatCompletionStreamResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.CreateChatCompletionStreamResponse.g.verified.cs
index 381f1887d4..cd89bb277f 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.CreateChatCompletionStreamResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.CreateChatCompletionStreamResponse.g.verified.cs
@@ -58,8 +58,7 @@ public sealed partial class CreateChatCompletionStreamResponse
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.CreateChatCompletionStreamResponseObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.CreateChatCompletionStreamResponseObject Object { get; set; } = global::G.CreateChatCompletionStreamResponseObject.ChatCompletionChunk;
+        public global::G.CreateChatCompletionStreamResponseObject Object { get; set; }
 
         /// <summary>
         /// An optional field that will only be present when you set `stream_options: {"include_usage": true}` in your request.<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.CreateCompletionResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.CreateCompletionResponse.g.verified.cs
index aaa71a1cb5..5c074ab1d7 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.CreateCompletionResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.CreateCompletionResponse.g.verified.cs
@@ -49,8 +49,7 @@ public sealed partial class CreateCompletionResponse
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.CreateCompletionResponseObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.CreateCompletionResponseObject Object { get; set; } = global::G.CreateCompletionResponseObject.TextCompletion;
+        public global::G.CreateCompletionResponseObject Object { get; set; }
 
         /// <summary>
         /// Usage statistics for the completion request.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.CreateEmbeddingResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.CreateEmbeddingResponse.g.verified.cs
index 96ed741a8e..660bc97a13 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.CreateEmbeddingResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.CreateEmbeddingResponse.g.verified.cs
@@ -28,8 +28,7 @@ public sealed partial class CreateEmbeddingResponse
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.CreateEmbeddingResponseObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.CreateEmbeddingResponseObject Object { get; set; } = global::G.CreateEmbeddingResponseObject.List;
+        public global::G.CreateEmbeddingResponseObject Object { get; set; }
 
         /// <summary>
         /// The usage information for the request.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.CreateThreadRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant1.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.CreateThreadRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant1.g.verified.cs
index 3255b7d2d1..35ef9cd944 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.CreateThreadRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant1.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.CreateThreadRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant1.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class CreateThreadRequestToolResourcesFileSearchVectorStor
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.CreateThreadRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant1TypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.CreateThreadRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant1Type Type { get; set; } = global::G.CreateThreadRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant1Type.Auto;
+        public global::G.CreateThreadRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant1Type Type { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.CreateThreadRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant2.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.CreateThreadRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant2.g.verified.cs
index a11d778810..34a3ffa6a7 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.CreateThreadRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant2.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.CreateThreadRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant2.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class CreateThreadRequestToolResourcesFileSearchVectorStor
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.CreateThreadRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant2TypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.CreateThreadRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant2Type Type { get; set; } = global::G.CreateThreadRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant2Type.Static;
+        public global::G.CreateThreadRequestToolResourcesFileSearchVectorStoreChunkingStrategyVariant2Type Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.DeleteAssistantResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.DeleteAssistantResponse.g.verified.cs
index 5d91aadc70..0d3b24433a 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.DeleteAssistantResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.DeleteAssistantResponse.g.verified.cs
@@ -28,8 +28,7 @@ public sealed partial class DeleteAssistantResponse
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.DeleteAssistantResponseObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.DeleteAssistantResponseObject Object { get; set; } = global::G.DeleteAssistantResponseObject.AssistantDeleted;
+        public global::G.DeleteAssistantResponseObject Object { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.DeleteFileResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.DeleteFileResponse.g.verified.cs
index c835a69f71..4b0928449d 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.DeleteFileResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.DeleteFileResponse.g.verified.cs
@@ -21,8 +21,7 @@ public sealed partial class DeleteFileResponse
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.DeleteFileResponseObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.DeleteFileResponseObject Object { get; set; } = global::G.DeleteFileResponseObject.File;
+        public global::G.DeleteFileResponseObject Object { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.DeleteMessageResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.DeleteMessageResponse.g.verified.cs
index c84b190a66..248d2c9151 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.DeleteMessageResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.DeleteMessageResponse.g.verified.cs
@@ -28,8 +28,7 @@ public sealed partial class DeleteMessageResponse
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.DeleteMessageResponseObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.DeleteMessageResponseObject Object { get; set; } = global::G.DeleteMessageResponseObject.ThreadMessageDeleted;
+        public global::G.DeleteMessageResponseObject Object { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.DeleteThreadResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.DeleteThreadResponse.g.verified.cs
index 69bd5b11d3..299c498a89 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.DeleteThreadResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.DeleteThreadResponse.g.verified.cs
@@ -28,8 +28,7 @@ public sealed partial class DeleteThreadResponse
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.DeleteThreadResponseObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.DeleteThreadResponseObject Object { get; set; } = global::G.DeleteThreadResponseObject.ThreadDeleted;
+        public global::G.DeleteThreadResponseObject Object { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.DeleteVectorStoreFileResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.DeleteVectorStoreFileResponse.g.verified.cs
index 67370186cf..0a6a12087a 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.DeleteVectorStoreFileResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.DeleteVectorStoreFileResponse.g.verified.cs
@@ -28,8 +28,7 @@ public sealed partial class DeleteVectorStoreFileResponse
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.DeleteVectorStoreFileResponseObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.DeleteVectorStoreFileResponseObject Object { get; set; } = global::G.DeleteVectorStoreFileResponseObject.VectorStoreFileDeleted;
+        public global::G.DeleteVectorStoreFileResponseObject Object { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.DeleteVectorStoreResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.DeleteVectorStoreResponse.g.verified.cs
index 4150b8402d..48c89b10f0 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.DeleteVectorStoreResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.DeleteVectorStoreResponse.g.verified.cs
@@ -28,8 +28,7 @@ public sealed partial class DeleteVectorStoreResponse
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.DeleteVectorStoreResponseObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.DeleteVectorStoreResponseObject Object { get; set; } = global::G.DeleteVectorStoreResponseObject.VectorStoreDeleted;
+        public global::G.DeleteVectorStoreResponseObject Object { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.DoneEvent.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.DoneEvent.g.verified.cs
index db39c3f790..6b45295523 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.DoneEvent.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.DoneEvent.g.verified.cs
@@ -14,16 +14,14 @@ public sealed partial class DoneEvent
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("event")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.DoneEventEventJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.DoneEventEvent Event { get; set; } = global::G.DoneEventEvent.Done;
+        public global::G.DoneEventEvent Event { get; set; }
 
         /// <summary>
         /// 
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("data")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.DoneEventDataJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.DoneEventData Data { get; set; } = global::G.DoneEventData.DONE;
+        public global::G.DoneEventData Data { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.Embedding.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.Embedding.g.verified.cs
index 98b878d33c..be6418bc66 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.Embedding.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.Embedding.g.verified.cs
@@ -28,8 +28,7 @@ public sealed partial class Embedding
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.EmbeddingObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.EmbeddingObject Object { get; set; } = global::G.EmbeddingObject.Embedding;
+        public global::G.EmbeddingObject Object { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ErrorEvent.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ErrorEvent.g.verified.cs
index 6142b98c1c..0cc101bd7f 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ErrorEvent.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ErrorEvent.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class ErrorEvent
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("event")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ErrorEventEventJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ErrorEventEvent Event { get; set; } = global::G.ErrorEventEvent.Error;
+        public global::G.ErrorEventEvent Event { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.FineTuningIntegration.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.FineTuningIntegration.g.verified.cs
index 0cc3eade06..80a0a7916a 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.FineTuningIntegration.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.FineTuningIntegration.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class FineTuningIntegration
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.FineTuningIntegrationTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.FineTuningIntegrationType Type { get; set; } = global::G.FineTuningIntegrationType.Wandb;
+        public global::G.FineTuningIntegrationType Type { get; set; }
 
         /// <summary>
         /// The settings for your integration with Weights and Biases. This payload specifies the project that<br/>
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.FineTuningJob.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.FineTuningJob.g.verified.cs
index 7d702d8ff5..f7211568d6 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.FineTuningJob.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.FineTuningJob.g.verified.cs
@@ -65,8 +65,7 @@ public sealed partial class FineTuningJob
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.FineTuningJobObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.FineTuningJobObject Object { get; set; } = global::G.FineTuningJobObject.FineTuningJob;
+        public global::G.FineTuningJobObject Object { get; set; }
 
         /// <summary>
         /// The organization that owns the fine-tuning job.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.FineTuningJobCheckpoint.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.FineTuningJobCheckpoint.g.verified.cs
index 9523aa5617..9031da36f5 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.FineTuningJobCheckpoint.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.FineTuningJobCheckpoint.g.verified.cs
@@ -56,8 +56,7 @@ public sealed partial class FineTuningJobCheckpoint
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.FineTuningJobCheckpointObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.FineTuningJobCheckpointObject Object { get; set; } = global::G.FineTuningJobCheckpointObject.FineTuningJobCheckpoint;
+        public global::G.FineTuningJobCheckpointObject Object { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.FineTuningJobEvent.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.FineTuningJobEvent.g.verified.cs
index 8f07ac4f66..46f9093a24 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.FineTuningJobEvent.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.FineTuningJobEvent.g.verified.cs
@@ -43,8 +43,7 @@ public sealed partial class FineTuningJobEvent
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.FineTuningJobEventObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.FineTuningJobEventObject Object { get; set; } = global::G.FineTuningJobEventObject.FineTuningJobEvent;
+        public global::G.FineTuningJobEventObject Object { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.Invite.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.Invite.g.verified.cs
index 77ede34154..ee1e9adbab 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.Invite.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.Invite.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class Invite
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.InviteObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.InviteObject Object { get; set; } = global::G.InviteObject.OrganizationInvite;
+        public global::G.InviteObject Object { get; set; }
 
         /// <summary>
         /// The identifier, which can be referenced in API endpoints
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.InviteDeleteResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.InviteDeleteResponse.g.verified.cs
index 62a72e243a..aeea5ca2ee 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.InviteDeleteResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.InviteDeleteResponse.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class InviteDeleteResponse
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.InviteDeleteResponseObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.InviteDeleteResponseObject Object { get; set; } = global::G.InviteDeleteResponseObject.OrganizationInviteDeleted;
+        public global::G.InviteDeleteResponseObject Object { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.InviteListResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.InviteListResponse.g.verified.cs
index 357556cb42..a9e92a1838 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.InviteListResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.InviteListResponse.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class InviteListResponse
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.InviteListResponseObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.InviteListResponseObject Object { get; set; } = global::G.InviteListResponseObject.List;
+        public global::G.InviteListResponseObject Object { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ListAuditLogsResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ListAuditLogsResponse.g.verified.cs
index e3fb3a3374..3759ad44cf 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ListAuditLogsResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ListAuditLogsResponse.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class ListAuditLogsResponse
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ListAuditLogsResponseObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ListAuditLogsResponseObject Object { get; set; } = global::G.ListAuditLogsResponseObject.List;
+        public global::G.ListAuditLogsResponseObject Object { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ListBatchesResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ListBatchesResponse.g.verified.cs
index 6686f490f1..1571197db7 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ListBatchesResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ListBatchesResponse.g.verified.cs
@@ -40,8 +40,7 @@ public sealed partial class ListBatchesResponse
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ListBatchesResponseObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ListBatchesResponseObject Object { get; set; } = global::G.ListBatchesResponseObject.List;
+        public global::G.ListBatchesResponseObject Object { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ListFilesResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ListFilesResponse.g.verified.cs
index f457d1e23e..1b05b7db47 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ListFilesResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ListFilesResponse.g.verified.cs
@@ -21,8 +21,7 @@ public sealed partial class ListFilesResponse
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ListFilesResponseObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ListFilesResponseObject Object { get; set; } = global::G.ListFilesResponseObject.List;
+        public global::G.ListFilesResponseObject Object { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ListFineTuningJobCheckpointsResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ListFineTuningJobCheckpointsResponse.g.verified.cs
index 2dca47ab83..1cfa368b88 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ListFineTuningJobCheckpointsResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ListFineTuningJobCheckpointsResponse.g.verified.cs
@@ -21,8 +21,7 @@ public sealed partial class ListFineTuningJobCheckpointsResponse
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ListFineTuningJobCheckpointsResponseObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ListFineTuningJobCheckpointsResponseObject Object { get; set; } = global::G.ListFineTuningJobCheckpointsResponseObject.List;
+        public global::G.ListFineTuningJobCheckpointsResponseObject Object { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ListFineTuningJobEventsResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ListFineTuningJobEventsResponse.g.verified.cs
index 25cb345556..8b350ec55c 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ListFineTuningJobEventsResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ListFineTuningJobEventsResponse.g.verified.cs
@@ -21,8 +21,7 @@ public sealed partial class ListFineTuningJobEventsResponse
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ListFineTuningJobEventsResponseObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ListFineTuningJobEventsResponseObject Object { get; set; } = global::G.ListFineTuningJobEventsResponseObject.List;
+        public global::G.ListFineTuningJobEventsResponseObject Object { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ListModelsResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ListModelsResponse.g.verified.cs
index f5b0bfe711..cec69b9f96 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ListModelsResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ListModelsResponse.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class ListModelsResponse
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ListModelsResponseObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ListModelsResponseObject Object { get; set; } = global::G.ListModelsResponseObject.List;
+        public global::G.ListModelsResponseObject Object { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ListPaginatedFineTuningJobsResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ListPaginatedFineTuningJobsResponse.g.verified.cs
index d40011a313..945ad6e158 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ListPaginatedFineTuningJobsResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ListPaginatedFineTuningJobsResponse.g.verified.cs
@@ -28,8 +28,7 @@ public sealed partial class ListPaginatedFineTuningJobsResponse
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ListPaginatedFineTuningJobsResponseObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ListPaginatedFineTuningJobsResponseObject Object { get; set; } = global::G.ListPaginatedFineTuningJobsResponseObject.List;
+        public global::G.ListPaginatedFineTuningJobsResponseObject Object { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageContentImageFileObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageContentImageFileObject.g.verified.cs
index 0f72e7b29d..d4a6eb0b39 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageContentImageFileObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageContentImageFileObject.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class MessageContentImageFileObject
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.MessageContentImageFileObjectTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.MessageContentImageFileObjectType Type { get; set; } = global::G.MessageContentImageFileObjectType.ImageFile;
+        public global::G.MessageContentImageFileObjectType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageContentImageUrlObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageContentImageUrlObject.g.verified.cs
index dd00973e94..8959ee4bd6 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageContentImageUrlObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageContentImageUrlObject.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class MessageContentImageUrlObject
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.MessageContentImageUrlObjectTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.MessageContentImageUrlObjectType Type { get; set; } = global::G.MessageContentImageUrlObjectType.ImageUrl;
+        public global::G.MessageContentImageUrlObjectType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageContentRefusalObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageContentRefusalObject.g.verified.cs
index 9ca865a282..901955ae05 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageContentRefusalObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageContentRefusalObject.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class MessageContentRefusalObject
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.MessageContentRefusalObjectTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.MessageContentRefusalObjectType Type { get; set; } = global::G.MessageContentRefusalObjectType.Refusal;
+        public global::G.MessageContentRefusalObjectType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageContentTextAnnotationsFileCitationObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageContentTextAnnotationsFileCitationObject.g.verified.cs
index a8c87f904b..6d1853841a 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageContentTextAnnotationsFileCitationObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageContentTextAnnotationsFileCitationObject.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class MessageContentTextAnnotationsFileCitationObject
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.MessageContentTextAnnotationsFileCitationObjectTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.MessageContentTextAnnotationsFileCitationObjectType Type { get; set; } = global::G.MessageContentTextAnnotationsFileCitationObjectType.FileCitation;
+        public global::G.MessageContentTextAnnotationsFileCitationObjectType Type { get; set; }
 
         /// <summary>
         /// The text in the message content that needs to be replaced.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageContentTextAnnotationsFilePathObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageContentTextAnnotationsFilePathObject.g.verified.cs
index a98b51bfae..86106b95f4 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageContentTextAnnotationsFilePathObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageContentTextAnnotationsFilePathObject.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class MessageContentTextAnnotationsFilePathObject
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.MessageContentTextAnnotationsFilePathObjectTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.MessageContentTextAnnotationsFilePathObjectType Type { get; set; } = global::G.MessageContentTextAnnotationsFilePathObjectType.FilePath;
+        public global::G.MessageContentTextAnnotationsFilePathObjectType Type { get; set; }
 
         /// <summary>
         /// The text in the message content that needs to be replaced.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageContentTextObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageContentTextObject.g.verified.cs
index 7f64e72196..e858155d17 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageContentTextObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageContentTextObject.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class MessageContentTextObject
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.MessageContentTextObjectTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.MessageContentTextObjectType Type { get; set; } = global::G.MessageContentTextObjectType.Text;
+        public global::G.MessageContentTextObjectType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageDeltaContentImageFileObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageDeltaContentImageFileObject.g.verified.cs
index 02cebbcee1..2d4bb4eeb9 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageDeltaContentImageFileObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageDeltaContentImageFileObject.g.verified.cs
@@ -21,8 +21,7 @@ public sealed partial class MessageDeltaContentImageFileObject
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.MessageDeltaContentImageFileObjectTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.MessageDeltaContentImageFileObjectType Type { get; set; } = global::G.MessageDeltaContentImageFileObjectType.ImageFile;
+        public global::G.MessageDeltaContentImageFileObjectType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageDeltaContentImageUrlObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageDeltaContentImageUrlObject.g.verified.cs
index 6a9d35f7de..4e8b221633 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageDeltaContentImageUrlObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageDeltaContentImageUrlObject.g.verified.cs
@@ -21,8 +21,7 @@ public sealed partial class MessageDeltaContentImageUrlObject
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.MessageDeltaContentImageUrlObjectTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.MessageDeltaContentImageUrlObjectType Type { get; set; } = global::G.MessageDeltaContentImageUrlObjectType.ImageUrl;
+        public global::G.MessageDeltaContentImageUrlObjectType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageDeltaContentRefusalObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageDeltaContentRefusalObject.g.verified.cs
index 5f9551fe9f..5ba07c1bd0 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageDeltaContentRefusalObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageDeltaContentRefusalObject.g.verified.cs
@@ -21,8 +21,7 @@ public sealed partial class MessageDeltaContentRefusalObject
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.MessageDeltaContentRefusalObjectTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.MessageDeltaContentRefusalObjectType Type { get; set; } = global::G.MessageDeltaContentRefusalObjectType.Refusal;
+        public global::G.MessageDeltaContentRefusalObjectType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageDeltaContentTextAnnotationsFileCitationObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageDeltaContentTextAnnotationsFileCitationObject.g.verified.cs
index 5a1f292265..efcb0662f6 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageDeltaContentTextAnnotationsFileCitationObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageDeltaContentTextAnnotationsFileCitationObject.g.verified.cs
@@ -21,8 +21,7 @@ public sealed partial class MessageDeltaContentTextAnnotationsFileCitationObject
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.MessageDeltaContentTextAnnotationsFileCitationObjectTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.MessageDeltaContentTextAnnotationsFileCitationObjectType Type { get; set; } = global::G.MessageDeltaContentTextAnnotationsFileCitationObjectType.FileCitation;
+        public global::G.MessageDeltaContentTextAnnotationsFileCitationObjectType Type { get; set; }
 
         /// <summary>
         /// The text in the message content that needs to be replaced.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageDeltaContentTextAnnotationsFilePathObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageDeltaContentTextAnnotationsFilePathObject.g.verified.cs
index 0ff6c81a3e..0e591c21b6 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageDeltaContentTextAnnotationsFilePathObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageDeltaContentTextAnnotationsFilePathObject.g.verified.cs
@@ -21,8 +21,7 @@ public sealed partial class MessageDeltaContentTextAnnotationsFilePathObject
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.MessageDeltaContentTextAnnotationsFilePathObjectTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.MessageDeltaContentTextAnnotationsFilePathObjectType Type { get; set; } = global::G.MessageDeltaContentTextAnnotationsFilePathObjectType.FilePath;
+        public global::G.MessageDeltaContentTextAnnotationsFilePathObjectType Type { get; set; }
 
         /// <summary>
         /// The text in the message content that needs to be replaced.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageDeltaContentTextObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageDeltaContentTextObject.g.verified.cs
index 23fa5a3cdc..3df7b73400 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageDeltaContentTextObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageDeltaContentTextObject.g.verified.cs
@@ -21,8 +21,7 @@ public sealed partial class MessageDeltaContentTextObject
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.MessageDeltaContentTextObjectTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.MessageDeltaContentTextObjectType Type { get; set; } = global::G.MessageDeltaContentTextObjectType.Text;
+        public global::G.MessageDeltaContentTextObjectType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageDeltaObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageDeltaObject.g.verified.cs
index 724f0fd5b0..9d950334b4 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageDeltaObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageDeltaObject.g.verified.cs
@@ -21,8 +21,7 @@ public sealed partial class MessageDeltaObject
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.MessageDeltaObjectObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.MessageDeltaObjectObject Object { get; set; } = global::G.MessageDeltaObjectObject.ThreadMessageDelta;
+        public global::G.MessageDeltaObjectObject Object { get; set; }
 
         /// <summary>
         /// The delta containing the fields that have changed on the Message.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageObject.g.verified.cs
index 2177b82b54..17480ee567 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageObject.g.verified.cs
@@ -23,8 +23,7 @@ public sealed partial class MessageObject
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.MessageObjectObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.MessageObjectObject Object { get; set; } = global::G.MessageObjectObject.ThreadMessage;
+        public global::G.MessageObjectObject Object { get; set; }
 
         /// <summary>
         /// The Unix timestamp (in seconds) for when the message was created.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageRequestContentTextObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageRequestContentTextObject.g.verified.cs
index cb27fc68f9..48ff7b2af3 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageRequestContentTextObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageRequestContentTextObject.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class MessageRequestContentTextObject
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.MessageRequestContentTextObjectTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.MessageRequestContentTextObjectType Type { get; set; } = global::G.MessageRequestContentTextObjectType.Text;
+        public global::G.MessageRequestContentTextObjectType Type { get; set; }
 
         /// <summary>
         /// Text content to be sent to the model
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageStreamEventVariant1.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageStreamEventVariant1.g.verified.cs
index c4875f6b83..996f24ba0e 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageStreamEventVariant1.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageStreamEventVariant1.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class MessageStreamEventVariant1
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("event")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.MessageStreamEventVariant1EventJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.MessageStreamEventVariant1Event Event { get; set; } = global::G.MessageStreamEventVariant1Event.ThreadMessageCreated;
+        public global::G.MessageStreamEventVariant1Event Event { get; set; }
 
         /// <summary>
         /// Represents a message within a [thread](/docs/api-reference/threads).
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageStreamEventVariant2.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageStreamEventVariant2.g.verified.cs
index f38404128d..ec767dc31f 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageStreamEventVariant2.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageStreamEventVariant2.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class MessageStreamEventVariant2
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("event")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.MessageStreamEventVariant2EventJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.MessageStreamEventVariant2Event Event { get; set; } = global::G.MessageStreamEventVariant2Event.ThreadMessageInProgress;
+        public global::G.MessageStreamEventVariant2Event Event { get; set; }
 
         /// <summary>
         /// Represents a message within a [thread](/docs/api-reference/threads).
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageStreamEventVariant3.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageStreamEventVariant3.g.verified.cs
index 131fe891ba..44c7478029 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageStreamEventVariant3.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageStreamEventVariant3.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class MessageStreamEventVariant3
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("event")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.MessageStreamEventVariant3EventJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.MessageStreamEventVariant3Event Event { get; set; } = global::G.MessageStreamEventVariant3Event.ThreadMessageDelta;
+        public global::G.MessageStreamEventVariant3Event Event { get; set; }
 
         /// <summary>
         /// Represents a message delta i.e. any changed fields on a message during streaming.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageStreamEventVariant4.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageStreamEventVariant4.g.verified.cs
index dea6e87175..46a0613629 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageStreamEventVariant4.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageStreamEventVariant4.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class MessageStreamEventVariant4
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("event")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.MessageStreamEventVariant4EventJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.MessageStreamEventVariant4Event Event { get; set; } = global::G.MessageStreamEventVariant4Event.ThreadMessageCompleted;
+        public global::G.MessageStreamEventVariant4Event Event { get; set; }
 
         /// <summary>
         /// Represents a message within a [thread](/docs/api-reference/threads).
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageStreamEventVariant5.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageStreamEventVariant5.g.verified.cs
index 4045d89c86..185289e57d 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageStreamEventVariant5.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.MessageStreamEventVariant5.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class MessageStreamEventVariant5
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("event")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.MessageStreamEventVariant5EventJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.MessageStreamEventVariant5Event Event { get; set; } = global::G.MessageStreamEventVariant5Event.ThreadMessageIncomplete;
+        public global::G.MessageStreamEventVariant5Event Event { get; set; }
 
         /// <summary>
         /// Represents a message within a [thread](/docs/api-reference/threads).
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.Model12.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.Model12.g.verified.cs
index 6d04a486a0..3309893cf1 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.Model12.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.Model12.g.verified.cs
@@ -28,8 +28,7 @@ public sealed partial class Model12
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ModelObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ModelObject Object { get; set; } = global::G.ModelObject.Model;
+        public global::G.ModelObject Object { get; set; }
 
         /// <summary>
         /// The organization that owns the model.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.OpenAIFile.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.OpenAIFile.g.verified.cs
index c0cbb220e5..3f75b45919 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.OpenAIFile.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.OpenAIFile.g.verified.cs
@@ -42,8 +42,7 @@ public sealed partial class OpenAIFile
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.OpenAIFileObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.OpenAIFileObject Object { get; set; } = global::G.OpenAIFileObject.File;
+        public global::G.OpenAIFileObject Object { get; set; }
 
         /// <summary>
         /// The intended purpose of the file. Supported values are `assistants`, `assistants_output`, `batch`, `batch_output`, `fine-tune`, `fine-tune-results` and `vision`.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.OtherChunkingStrategyResponseParam.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.OtherChunkingStrategyResponseParam.g.verified.cs
index 6f13fe1c76..90f6398667 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.OtherChunkingStrategyResponseParam.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.OtherChunkingStrategyResponseParam.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class OtherChunkingStrategyResponseParam
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.OtherChunkingStrategyResponseParamTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.OtherChunkingStrategyResponseParamType Type { get; set; } = global::G.OtherChunkingStrategyResponseParamType.Other;
+        public global::G.OtherChunkingStrategyResponseParamType Type { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.Project.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.Project.g.verified.cs
index 144e5f093b..26a78568c5 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.Project.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.Project.g.verified.cs
@@ -21,8 +21,7 @@ public sealed partial class Project
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ProjectObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ProjectObject Object { get; set; } = global::G.ProjectObject.OrganizationProject;
+        public global::G.ProjectObject Object { get; set; }
 
         /// <summary>
         /// The name of the project. This appears in reporting.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectApiKey.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectApiKey.g.verified.cs
index 91a1890fb2..b8ad5192a4 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectApiKey.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectApiKey.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class ProjectApiKey
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ProjectApiKeyObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ProjectApiKeyObject Object { get; set; } = global::G.ProjectApiKeyObject.OrganizationProjectApiKey;
+        public global::G.ProjectApiKeyObject Object { get; set; }
 
         /// <summary>
         /// The redacted value of the API key
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectApiKeyDeleteResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectApiKeyDeleteResponse.g.verified.cs
index da76a2032b..4544ed32ea 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectApiKeyDeleteResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectApiKeyDeleteResponse.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class ProjectApiKeyDeleteResponse
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ProjectApiKeyDeleteResponseObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ProjectApiKeyDeleteResponseObject Object { get; set; } = global::G.ProjectApiKeyDeleteResponseObject.OrganizationProjectApiKeyDeleted;
+        public global::G.ProjectApiKeyDeleteResponseObject Object { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectApiKeyListResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectApiKeyListResponse.g.verified.cs
index e4df9c05f4..58af375635 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectApiKeyListResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectApiKeyListResponse.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class ProjectApiKeyListResponse
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ProjectApiKeyListResponseObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ProjectApiKeyListResponseObject Object { get; set; } = global::G.ProjectApiKeyListResponseObject.List;
+        public global::G.ProjectApiKeyListResponseObject Object { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectListResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectListResponse.g.verified.cs
index 223c314a72..7d5a4f734c 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectListResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectListResponse.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class ProjectListResponse
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ProjectListResponseObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ProjectListResponseObject Object { get; set; } = global::G.ProjectListResponseObject.List;
+        public global::G.ProjectListResponseObject Object { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectServiceAccount.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectServiceAccount.g.verified.cs
index 425edd2e84..80fbe927bf 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectServiceAccount.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectServiceAccount.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class ProjectServiceAccount
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ProjectServiceAccountObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ProjectServiceAccountObject Object { get; set; } = global::G.ProjectServiceAccountObject.OrganizationProjectServiceAccount;
+        public global::G.ProjectServiceAccountObject Object { get; set; }
 
         /// <summary>
         /// The identifier, which can be referenced in API endpoints
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectServiceAccountApiKey.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectServiceAccountApiKey.g.verified.cs
index 518b98f8c1..bb529cbda8 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectServiceAccountApiKey.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectServiceAccountApiKey.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class ProjectServiceAccountApiKey
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ProjectServiceAccountApiKeyObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ProjectServiceAccountApiKeyObject Object { get; set; } = global::G.ProjectServiceAccountApiKeyObject.OrganizationProjectServiceAccountApiKey;
+        public global::G.ProjectServiceAccountApiKeyObject Object { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectServiceAccountCreateResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectServiceAccountCreateResponse.g.verified.cs
index 44375dc218..114a3c8df3 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectServiceAccountCreateResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectServiceAccountCreateResponse.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class ProjectServiceAccountCreateResponse
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ProjectServiceAccountCreateResponseObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ProjectServiceAccountCreateResponseObject Object { get; set; } = global::G.ProjectServiceAccountCreateResponseObject.OrganizationProjectServiceAccount;
+        public global::G.ProjectServiceAccountCreateResponseObject Object { get; set; }
 
         /// <summary>
         /// 
@@ -36,8 +35,7 @@ public sealed partial class ProjectServiceAccountCreateResponse
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("role")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ProjectServiceAccountCreateResponseRoleJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ProjectServiceAccountCreateResponseRole Role { get; set; } = global::G.ProjectServiceAccountCreateResponseRole.Member;
+        public global::G.ProjectServiceAccountCreateResponseRole Role { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectServiceAccountDeleteResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectServiceAccountDeleteResponse.g.verified.cs
index e2aca5350c..f43750d2b6 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectServiceAccountDeleteResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectServiceAccountDeleteResponse.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class ProjectServiceAccountDeleteResponse
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ProjectServiceAccountDeleteResponseObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ProjectServiceAccountDeleteResponseObject Object { get; set; } = global::G.ProjectServiceAccountDeleteResponseObject.OrganizationProjectServiceAccountDeleted;
+        public global::G.ProjectServiceAccountDeleteResponseObject Object { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectServiceAccountListResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectServiceAccountListResponse.g.verified.cs
index 59195c8542..cabfa7f426 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectServiceAccountListResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectServiceAccountListResponse.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class ProjectServiceAccountListResponse
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ProjectServiceAccountListResponseObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ProjectServiceAccountListResponseObject Object { get; set; } = global::G.ProjectServiceAccountListResponseObject.List;
+        public global::G.ProjectServiceAccountListResponseObject Object { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectUser.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectUser.g.verified.cs
index f94cb7035d..27b5c306b9 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectUser.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectUser.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class ProjectUser
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ProjectUserObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ProjectUserObject Object { get; set; } = global::G.ProjectUserObject.OrganizationProjectUser;
+        public global::G.ProjectUserObject Object { get; set; }
 
         /// <summary>
         /// The identifier, which can be referenced in API endpoints
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectUserDeleteResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectUserDeleteResponse.g.verified.cs
index 80eb9fcd38..6b0a84e1a5 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectUserDeleteResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ProjectUserDeleteResponse.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class ProjectUserDeleteResponse
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ProjectUserDeleteResponseObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ProjectUserDeleteResponseObject Object { get; set; } = global::G.ProjectUserDeleteResponseObject.OrganizationProjectUserDeleted;
+        public global::G.ProjectUserDeleteResponseObject Object { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ResponseFormatJsonObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ResponseFormatJsonObject.g.verified.cs
index b268fa85f7..4f5c68209c 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ResponseFormatJsonObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ResponseFormatJsonObject.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class ResponseFormatJsonObject
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ResponseFormatJsonObjectTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ResponseFormatJsonObjectType Type { get; set; } = global::G.ResponseFormatJsonObjectType.JsonObject;
+        public global::G.ResponseFormatJsonObjectType Type { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ResponseFormatJsonSchema.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ResponseFormatJsonSchema.g.verified.cs
index 2c4505e1dd..597fd17355 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ResponseFormatJsonSchema.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ResponseFormatJsonSchema.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class ResponseFormatJsonSchema
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ResponseFormatJsonSchemaTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ResponseFormatJsonSchemaType Type { get; set; } = global::G.ResponseFormatJsonSchemaType.JsonSchema;
+        public global::G.ResponseFormatJsonSchemaType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ResponseFormatText.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ResponseFormatText.g.verified.cs
index 6f3faf79b3..7ec144c400 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ResponseFormatText.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ResponseFormatText.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class ResponseFormatText
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ResponseFormatTextTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ResponseFormatTextType Type { get; set; } = global::G.ResponseFormatTextType.Text;
+        public global::G.ResponseFormatTextType Type { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunObject.g.verified.cs
index 1f207b27ca..270aced9b0 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunObject.g.verified.cs
@@ -23,8 +23,7 @@ public sealed partial class RunObject
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RunObjectObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RunObjectObject Object { get; set; } = global::G.RunObjectObject.ThreadRun;
+        public global::G.RunObjectObject Object { get; set; }
 
         /// <summary>
         /// The Unix timestamp (in seconds) for when the run was created.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunObjectRequiredAction.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunObjectRequiredAction.g.verified.cs
index dea7b384ac..7ea728eebb 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunObjectRequiredAction.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunObjectRequiredAction.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class RunObjectRequiredAction
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RunObjectRequiredActionTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RunObjectRequiredActionType Type { get; set; } = global::G.RunObjectRequiredActionType.SubmitToolOutputs;
+        public global::G.RunObjectRequiredActionType Type { get; set; }
 
         /// <summary>
         /// Details on the tool outputs needed for this run to continue.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDeltaObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDeltaObject.g.verified.cs
index be92370576..97f6382e1e 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDeltaObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDeltaObject.g.verified.cs
@@ -21,8 +21,7 @@ public sealed partial class RunStepDeltaObject
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RunStepDeltaObjectObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RunStepDeltaObjectObject Object { get; set; } = global::G.RunStepDeltaObjectObject.ThreadRunStepDelta;
+        public global::G.RunStepDeltaObjectObject Object { get; set; }
 
         /// <summary>
         /// The delta containing the fields that have changed on the run step.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDeltaStepDetailsMessageCreationObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDeltaStepDetailsMessageCreationObject.g.verified.cs
index 52ce668f8c..413dc58b3f 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDeltaStepDetailsMessageCreationObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDeltaStepDetailsMessageCreationObject.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class RunStepDeltaStepDetailsMessageCreationObject
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RunStepDeltaStepDetailsMessageCreationObjectTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RunStepDeltaStepDetailsMessageCreationObjectType Type { get; set; } = global::G.RunStepDeltaStepDetailsMessageCreationObjectType.MessageCreation;
+        public global::G.RunStepDeltaStepDetailsMessageCreationObjectType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDeltaStepDetailsToolCallsCodeObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDeltaStepDetailsToolCallsCodeObject.g.verified.cs
index ec9b2e6b45..ca45379e74 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDeltaStepDetailsToolCallsCodeObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDeltaStepDetailsToolCallsCodeObject.g.verified.cs
@@ -27,8 +27,7 @@ public sealed partial class RunStepDeltaStepDetailsToolCallsCodeObject
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RunStepDeltaStepDetailsToolCallsCodeObjectTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RunStepDeltaStepDetailsToolCallsCodeObjectType Type { get; set; } = global::G.RunStepDeltaStepDetailsToolCallsCodeObjectType.CodeInterpreter;
+        public global::G.RunStepDeltaStepDetailsToolCallsCodeObjectType Type { get; set; }
 
         /// <summary>
         /// The Code Interpreter tool call definition.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDeltaStepDetailsToolCallsCodeOutputImageObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDeltaStepDetailsToolCallsCodeOutputImageObject.g.verified.cs
index c2bb0bbf96..c8f18aae71 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDeltaStepDetailsToolCallsCodeOutputImageObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDeltaStepDetailsToolCallsCodeOutputImageObject.g.verified.cs
@@ -21,8 +21,7 @@ public sealed partial class RunStepDeltaStepDetailsToolCallsCodeOutputImageObjec
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RunStepDeltaStepDetailsToolCallsCodeOutputImageObjectTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RunStepDeltaStepDetailsToolCallsCodeOutputImageObjectType Type { get; set; } = global::G.RunStepDeltaStepDetailsToolCallsCodeOutputImageObjectType.Image;
+        public global::G.RunStepDeltaStepDetailsToolCallsCodeOutputImageObjectType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDeltaStepDetailsToolCallsCodeOutputLogsObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDeltaStepDetailsToolCallsCodeOutputLogsObject.g.verified.cs
index 2c6ff119a4..e33940aad0 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDeltaStepDetailsToolCallsCodeOutputLogsObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDeltaStepDetailsToolCallsCodeOutputLogsObject.g.verified.cs
@@ -21,8 +21,7 @@ public sealed partial class RunStepDeltaStepDetailsToolCallsCodeOutputLogsObject
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RunStepDeltaStepDetailsToolCallsCodeOutputLogsObjectTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RunStepDeltaStepDetailsToolCallsCodeOutputLogsObjectType Type { get; set; } = global::G.RunStepDeltaStepDetailsToolCallsCodeOutputLogsObjectType.Logs;
+        public global::G.RunStepDeltaStepDetailsToolCallsCodeOutputLogsObjectType Type { get; set; }
 
         /// <summary>
         /// The text output from the Code Interpreter tool call.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDeltaStepDetailsToolCallsFileSearchObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDeltaStepDetailsToolCallsFileSearchObject.g.verified.cs
index 5e0315d4d4..a26c9bae88 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDeltaStepDetailsToolCallsFileSearchObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDeltaStepDetailsToolCallsFileSearchObject.g.verified.cs
@@ -27,8 +27,7 @@ public sealed partial class RunStepDeltaStepDetailsToolCallsFileSearchObject
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RunStepDeltaStepDetailsToolCallsFileSearchObjectTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RunStepDeltaStepDetailsToolCallsFileSearchObjectType Type { get; set; } = global::G.RunStepDeltaStepDetailsToolCallsFileSearchObjectType.FileSearch;
+        public global::G.RunStepDeltaStepDetailsToolCallsFileSearchObjectType Type { get; set; }
 
         /// <summary>
         /// For now, this is always going to be an empty object.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDeltaStepDetailsToolCallsFunctionObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDeltaStepDetailsToolCallsFunctionObject.g.verified.cs
index 0a09fef2e1..adb352b7bd 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDeltaStepDetailsToolCallsFunctionObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDeltaStepDetailsToolCallsFunctionObject.g.verified.cs
@@ -27,8 +27,7 @@ public sealed partial class RunStepDeltaStepDetailsToolCallsFunctionObject
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RunStepDeltaStepDetailsToolCallsFunctionObjectTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RunStepDeltaStepDetailsToolCallsFunctionObjectType Type { get; set; } = global::G.RunStepDeltaStepDetailsToolCallsFunctionObjectType.Function;
+        public global::G.RunStepDeltaStepDetailsToolCallsFunctionObjectType Type { get; set; }
 
         /// <summary>
         /// The definition of the function that was called.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDeltaStepDetailsToolCallsObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDeltaStepDetailsToolCallsObject.g.verified.cs
index 8c9ae7ab88..a975e4eabd 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDeltaStepDetailsToolCallsObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDeltaStepDetailsToolCallsObject.g.verified.cs
@@ -16,8 +16,7 @@ public sealed partial class RunStepDeltaStepDetailsToolCallsObject
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RunStepDeltaStepDetailsToolCallsObjectTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RunStepDeltaStepDetailsToolCallsObjectType Type { get; set; } = global::G.RunStepDeltaStepDetailsToolCallsObjectType.ToolCalls;
+        public global::G.RunStepDeltaStepDetailsToolCallsObjectType Type { get; set; }
 
         /// <summary>
         /// An array of tool calls the run step was involved in. These can be associated with one of three types of tools: `code_interpreter`, `file_search`, or `function`.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDetailsMessageCreationObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDetailsMessageCreationObject.g.verified.cs
index 129fb6cb88..38c6733be7 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDetailsMessageCreationObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDetailsMessageCreationObject.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class RunStepDetailsMessageCreationObject
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RunStepDetailsMessageCreationObjectTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RunStepDetailsMessageCreationObjectType Type { get; set; } = global::G.RunStepDetailsMessageCreationObjectType.MessageCreation;
+        public global::G.RunStepDetailsMessageCreationObjectType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDetailsToolCallsCodeObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDetailsToolCallsCodeObject.g.verified.cs
index 631d6568e7..4ec82cd124 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDetailsToolCallsCodeObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDetailsToolCallsCodeObject.g.verified.cs
@@ -21,8 +21,7 @@ public sealed partial class RunStepDetailsToolCallsCodeObject
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RunStepDetailsToolCallsCodeObjectTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RunStepDetailsToolCallsCodeObjectType Type { get; set; } = global::G.RunStepDetailsToolCallsCodeObjectType.CodeInterpreter;
+        public global::G.RunStepDetailsToolCallsCodeObjectType Type { get; set; }
 
         /// <summary>
         /// The Code Interpreter tool call definition.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDetailsToolCallsCodeOutputImageObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDetailsToolCallsCodeOutputImageObject.g.verified.cs
index 60da1dca0c..79bb150230 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDetailsToolCallsCodeOutputImageObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDetailsToolCallsCodeOutputImageObject.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class RunStepDetailsToolCallsCodeOutputImageObject
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RunStepDetailsToolCallsCodeOutputImageObjectTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RunStepDetailsToolCallsCodeOutputImageObjectType Type { get; set; } = global::G.RunStepDetailsToolCallsCodeOutputImageObjectType.Image;
+        public global::G.RunStepDetailsToolCallsCodeOutputImageObjectType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDetailsToolCallsCodeOutputLogsObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDetailsToolCallsCodeOutputLogsObject.g.verified.cs
index 5744073d09..25ec8f3b41 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDetailsToolCallsCodeOutputLogsObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDetailsToolCallsCodeOutputLogsObject.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class RunStepDetailsToolCallsCodeOutputLogsObject
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RunStepDetailsToolCallsCodeOutputLogsObjectTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RunStepDetailsToolCallsCodeOutputLogsObjectType Type { get; set; } = global::G.RunStepDetailsToolCallsCodeOutputLogsObjectType.Logs;
+        public global::G.RunStepDetailsToolCallsCodeOutputLogsObjectType Type { get; set; }
 
         /// <summary>
         /// The text output from the Code Interpreter tool call.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDetailsToolCallsFileSearchObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDetailsToolCallsFileSearchObject.g.verified.cs
index bd35cc0ef1..83a28bcc1e 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDetailsToolCallsFileSearchObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDetailsToolCallsFileSearchObject.g.verified.cs
@@ -21,8 +21,7 @@ public sealed partial class RunStepDetailsToolCallsFileSearchObject
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RunStepDetailsToolCallsFileSearchObjectTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RunStepDetailsToolCallsFileSearchObjectType Type { get; set; } = global::G.RunStepDetailsToolCallsFileSearchObjectType.FileSearch;
+        public global::G.RunStepDetailsToolCallsFileSearchObjectType Type { get; set; }
 
         /// <summary>
         /// For now, this is always going to be an empty object.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDetailsToolCallsFunctionObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDetailsToolCallsFunctionObject.g.verified.cs
index 59d92df513..7f803d24ef 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDetailsToolCallsFunctionObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDetailsToolCallsFunctionObject.g.verified.cs
@@ -21,8 +21,7 @@ public sealed partial class RunStepDetailsToolCallsFunctionObject
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RunStepDetailsToolCallsFunctionObjectTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RunStepDetailsToolCallsFunctionObjectType Type { get; set; } = global::G.RunStepDetailsToolCallsFunctionObjectType.Function;
+        public global::G.RunStepDetailsToolCallsFunctionObjectType Type { get; set; }
 
         /// <summary>
         /// The definition of the function that was called.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDetailsToolCallsObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDetailsToolCallsObject.g.verified.cs
index 326cb1ec94..e0abb88b0d 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDetailsToolCallsObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepDetailsToolCallsObject.g.verified.cs
@@ -16,8 +16,7 @@ public sealed partial class RunStepDetailsToolCallsObject
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RunStepDetailsToolCallsObjectTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RunStepDetailsToolCallsObjectType Type { get; set; } = global::G.RunStepDetailsToolCallsObjectType.ToolCalls;
+        public global::G.RunStepDetailsToolCallsObjectType Type { get; set; }
 
         /// <summary>
         /// An array of tool calls the run step was involved in. These can be associated with one of three types of tools: `code_interpreter`, `file_search`, or `function`.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepObject.g.verified.cs
index b4a7382d4d..7537db9b48 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepObject.g.verified.cs
@@ -23,8 +23,7 @@ public sealed partial class RunStepObject
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RunStepObjectObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RunStepObjectObject Object { get; set; } = global::G.RunStepObjectObject.ThreadRunStep;
+        public global::G.RunStepObjectObject Object { get; set; }
 
         /// <summary>
         /// The Unix timestamp (in seconds) for when the run step was created.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepStreamEventVariant1.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepStreamEventVariant1.g.verified.cs
index 3b829f983c..a9a5069f21 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepStreamEventVariant1.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepStreamEventVariant1.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class RunStepStreamEventVariant1
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("event")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RunStepStreamEventVariant1EventJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RunStepStreamEventVariant1Event Event { get; set; } = global::G.RunStepStreamEventVariant1Event.ThreadRunStepCreated;
+        public global::G.RunStepStreamEventVariant1Event Event { get; set; }
 
         /// <summary>
         /// Represents a step in execution of a run.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepStreamEventVariant2.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepStreamEventVariant2.g.verified.cs
index 22313fbfed..e63a0e8156 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepStreamEventVariant2.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepStreamEventVariant2.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class RunStepStreamEventVariant2
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("event")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RunStepStreamEventVariant2EventJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RunStepStreamEventVariant2Event Event { get; set; } = global::G.RunStepStreamEventVariant2Event.ThreadRunStepInProgress;
+        public global::G.RunStepStreamEventVariant2Event Event { get; set; }
 
         /// <summary>
         /// Represents a step in execution of a run.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepStreamEventVariant3.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepStreamEventVariant3.g.verified.cs
index 83411547f6..51ff63e257 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepStreamEventVariant3.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepStreamEventVariant3.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class RunStepStreamEventVariant3
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("event")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RunStepStreamEventVariant3EventJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RunStepStreamEventVariant3Event Event { get; set; } = global::G.RunStepStreamEventVariant3Event.ThreadRunStepDelta;
+        public global::G.RunStepStreamEventVariant3Event Event { get; set; }
 
         /// <summary>
         /// Represents a run step delta i.e. any changed fields on a run step during streaming.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepStreamEventVariant4.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepStreamEventVariant4.g.verified.cs
index 986a67f79d..966b7d6fcd 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepStreamEventVariant4.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepStreamEventVariant4.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class RunStepStreamEventVariant4
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("event")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RunStepStreamEventVariant4EventJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RunStepStreamEventVariant4Event Event { get; set; } = global::G.RunStepStreamEventVariant4Event.ThreadRunStepCompleted;
+        public global::G.RunStepStreamEventVariant4Event Event { get; set; }
 
         /// <summary>
         /// Represents a step in execution of a run.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepStreamEventVariant5.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepStreamEventVariant5.g.verified.cs
index 71ee4216f8..8331f05389 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepStreamEventVariant5.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepStreamEventVariant5.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class RunStepStreamEventVariant5
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("event")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RunStepStreamEventVariant5EventJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RunStepStreamEventVariant5Event Event { get; set; } = global::G.RunStepStreamEventVariant5Event.ThreadRunStepFailed;
+        public global::G.RunStepStreamEventVariant5Event Event { get; set; }
 
         /// <summary>
         /// Represents a step in execution of a run.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepStreamEventVariant6.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepStreamEventVariant6.g.verified.cs
index 5eb316a494..69c947b0d4 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepStreamEventVariant6.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepStreamEventVariant6.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class RunStepStreamEventVariant6
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("event")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RunStepStreamEventVariant6EventJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RunStepStreamEventVariant6Event Event { get; set; } = global::G.RunStepStreamEventVariant6Event.ThreadRunStepCancelled;
+        public global::G.RunStepStreamEventVariant6Event Event { get; set; }
 
         /// <summary>
         /// Represents a step in execution of a run.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepStreamEventVariant7.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepStreamEventVariant7.g.verified.cs
index 3106e8f8e1..c14b9e6d3e 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepStreamEventVariant7.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStepStreamEventVariant7.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class RunStepStreamEventVariant7
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("event")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RunStepStreamEventVariant7EventJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RunStepStreamEventVariant7Event Event { get; set; } = global::G.RunStepStreamEventVariant7Event.ThreadRunStepExpired;
+        public global::G.RunStepStreamEventVariant7Event Event { get; set; }
 
         /// <summary>
         /// Represents a step in execution of a run.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStreamEventVariant1.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStreamEventVariant1.g.verified.cs
index d21387af95..24179185cb 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStreamEventVariant1.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStreamEventVariant1.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class RunStreamEventVariant1
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("event")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RunStreamEventVariant1EventJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RunStreamEventVariant1Event Event { get; set; } = global::G.RunStreamEventVariant1Event.ThreadRunCreated;
+        public global::G.RunStreamEventVariant1Event Event { get; set; }
 
         /// <summary>
         /// Represents an execution run on a [thread](/docs/api-reference/threads).
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStreamEventVariant10.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStreamEventVariant10.g.verified.cs
index 5c9d5c45d1..edd8b72843 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStreamEventVariant10.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStreamEventVariant10.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class RunStreamEventVariant10
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("event")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RunStreamEventVariant10EventJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RunStreamEventVariant10Event Event { get; set; } = global::G.RunStreamEventVariant10Event.ThreadRunExpired;
+        public global::G.RunStreamEventVariant10Event Event { get; set; }
 
         /// <summary>
         /// Represents an execution run on a [thread](/docs/api-reference/threads).
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStreamEventVariant2.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStreamEventVariant2.g.verified.cs
index 7d3b5436aa..eb10ae4820 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStreamEventVariant2.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStreamEventVariant2.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class RunStreamEventVariant2
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("event")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RunStreamEventVariant2EventJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RunStreamEventVariant2Event Event { get; set; } = global::G.RunStreamEventVariant2Event.ThreadRunQueued;
+        public global::G.RunStreamEventVariant2Event Event { get; set; }
 
         /// <summary>
         /// Represents an execution run on a [thread](/docs/api-reference/threads).
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStreamEventVariant3.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStreamEventVariant3.g.verified.cs
index 78d42d37bd..b97587037e 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStreamEventVariant3.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStreamEventVariant3.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class RunStreamEventVariant3
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("event")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RunStreamEventVariant3EventJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RunStreamEventVariant3Event Event { get; set; } = global::G.RunStreamEventVariant3Event.ThreadRunInProgress;
+        public global::G.RunStreamEventVariant3Event Event { get; set; }
 
         /// <summary>
         /// Represents an execution run on a [thread](/docs/api-reference/threads).
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStreamEventVariant4.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStreamEventVariant4.g.verified.cs
index 9d4309c3e5..d3cacee383 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStreamEventVariant4.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStreamEventVariant4.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class RunStreamEventVariant4
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("event")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RunStreamEventVariant4EventJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RunStreamEventVariant4Event Event { get; set; } = global::G.RunStreamEventVariant4Event.ThreadRunRequiresAction;
+        public global::G.RunStreamEventVariant4Event Event { get; set; }
 
         /// <summary>
         /// Represents an execution run on a [thread](/docs/api-reference/threads).
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStreamEventVariant5.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStreamEventVariant5.g.verified.cs
index 10335838c1..8646c2f05b 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStreamEventVariant5.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStreamEventVariant5.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class RunStreamEventVariant5
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("event")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RunStreamEventVariant5EventJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RunStreamEventVariant5Event Event { get; set; } = global::G.RunStreamEventVariant5Event.ThreadRunCompleted;
+        public global::G.RunStreamEventVariant5Event Event { get; set; }
 
         /// <summary>
         /// Represents an execution run on a [thread](/docs/api-reference/threads).
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStreamEventVariant6.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStreamEventVariant6.g.verified.cs
index 8d3c0bfbca..1e31cce50c 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStreamEventVariant6.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStreamEventVariant6.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class RunStreamEventVariant6
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("event")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RunStreamEventVariant6EventJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RunStreamEventVariant6Event Event { get; set; } = global::G.RunStreamEventVariant6Event.ThreadRunIncomplete;
+        public global::G.RunStreamEventVariant6Event Event { get; set; }
 
         /// <summary>
         /// Represents an execution run on a [thread](/docs/api-reference/threads).
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStreamEventVariant7.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStreamEventVariant7.g.verified.cs
index cf50b54990..727e1e4bf7 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStreamEventVariant7.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStreamEventVariant7.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class RunStreamEventVariant7
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("event")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RunStreamEventVariant7EventJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RunStreamEventVariant7Event Event { get; set; } = global::G.RunStreamEventVariant7Event.ThreadRunFailed;
+        public global::G.RunStreamEventVariant7Event Event { get; set; }
 
         /// <summary>
         /// Represents an execution run on a [thread](/docs/api-reference/threads).
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStreamEventVariant8.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStreamEventVariant8.g.verified.cs
index 73a2590d2d..564da62835 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStreamEventVariant8.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStreamEventVariant8.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class RunStreamEventVariant8
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("event")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RunStreamEventVariant8EventJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RunStreamEventVariant8Event Event { get; set; } = global::G.RunStreamEventVariant8Event.ThreadRunCancelling;
+        public global::G.RunStreamEventVariant8Event Event { get; set; }
 
         /// <summary>
         /// Represents an execution run on a [thread](/docs/api-reference/threads).
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStreamEventVariant9.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStreamEventVariant9.g.verified.cs
index ca0c913113..d050600367 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStreamEventVariant9.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunStreamEventVariant9.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class RunStreamEventVariant9
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("event")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RunStreamEventVariant9EventJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RunStreamEventVariant9Event Event { get; set; } = global::G.RunStreamEventVariant9Event.ThreadRunCancelled;
+        public global::G.RunStreamEventVariant9Event Event { get; set; }
 
         /// <summary>
         /// Represents an execution run on a [thread](/docs/api-reference/threads).
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunToolCallObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunToolCallObject.g.verified.cs
index 25dea67a76..c0b467bf57 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunToolCallObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.RunToolCallObject.g.verified.cs
@@ -21,8 +21,7 @@ public sealed partial class RunToolCallObject
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.RunToolCallObjectTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.RunToolCallObjectType Type { get; set; } = global::G.RunToolCallObjectType.Function;
+        public global::G.RunToolCallObjectType Type { get; set; }
 
         /// <summary>
         /// The function definition.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.StaticChunkingStrategyRequestParam.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.StaticChunkingStrategyRequestParam.g.verified.cs
index 8426632681..42282b0392 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.StaticChunkingStrategyRequestParam.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.StaticChunkingStrategyRequestParam.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class StaticChunkingStrategyRequestParam
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.StaticChunkingStrategyRequestParamTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.StaticChunkingStrategyRequestParamType Type { get; set; } = global::G.StaticChunkingStrategyRequestParamType.Static;
+        public global::G.StaticChunkingStrategyRequestParamType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.StaticChunkingStrategyResponseParam.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.StaticChunkingStrategyResponseParam.g.verified.cs
index 147ce939bd..ae9740aa03 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.StaticChunkingStrategyResponseParam.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.StaticChunkingStrategyResponseParam.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class StaticChunkingStrategyResponseParam
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.StaticChunkingStrategyResponseParamTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.StaticChunkingStrategyResponseParamType Type { get; set; } = global::G.StaticChunkingStrategyResponseParamType.Static;
+        public global::G.StaticChunkingStrategyResponseParamType Type { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ThreadObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ThreadObject.g.verified.cs
index dfb3e6b1ed..31027f4770 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ThreadObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ThreadObject.g.verified.cs
@@ -21,8 +21,7 @@ public sealed partial class ThreadObject
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ThreadObjectObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ThreadObjectObject Object { get; set; } = global::G.ThreadObjectObject.Thread;
+        public global::G.ThreadObjectObject Object { get; set; }
 
         /// <summary>
         /// The Unix timestamp (in seconds) for when the thread was created.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ThreadStreamEventVariant1.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ThreadStreamEventVariant1.g.verified.cs
index a055efd462..9c36d4c023 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ThreadStreamEventVariant1.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.ThreadStreamEventVariant1.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class ThreadStreamEventVariant1
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("event")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ThreadStreamEventVariant1EventJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ThreadStreamEventVariant1Event Event { get; set; } = global::G.ThreadStreamEventVariant1Event.ThreadCreated;
+        public global::G.ThreadStreamEventVariant1Event Event { get; set; }
 
         /// <summary>
         /// Represents a thread that contains [messages](/docs/api-reference/messages).
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.UploadPart.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.UploadPart.g.verified.cs
index cb7ebf1d28..9da5cf1f08 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.UploadPart.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.UploadPart.g.verified.cs
@@ -35,8 +35,7 @@ public sealed partial class UploadPart
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.UploadPartObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.UploadPartObject Object { get; set; } = global::G.UploadPartObject.UploadPart;
+        public global::G.UploadPartObject Object { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.User.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.User.g.verified.cs
index 884128cbf8..247543f820 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.User.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.User.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class User
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.UserObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.UserObject Object { get; set; } = global::G.UserObject.OrganizationUser;
+        public global::G.UserObject Object { get; set; }
 
         /// <summary>
         /// The identifier, which can be referenced in API endpoints
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.UserDeleteResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.UserDeleteResponse.g.verified.cs
index 1ede362854..b870b6bd68 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.UserDeleteResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.UserDeleteResponse.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class UserDeleteResponse
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.UserDeleteResponseObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.UserDeleteResponseObject Object { get; set; } = global::G.UserDeleteResponseObject.OrganizationUserDeleted;
+        public global::G.UserDeleteResponseObject Object { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.UserListResponse.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.UserListResponse.g.verified.cs
index 82507fa25f..d1b33625a5 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.UserListResponse.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.UserListResponse.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class UserListResponse
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.UserListResponseObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.UserListResponseObject Object { get; set; } = global::G.UserListResponseObject.List;
+        public global::G.UserListResponseObject Object { get; set; }
 
         /// <summary>
         /// 
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.VectorStoreExpirationAfter.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.VectorStoreExpirationAfter.g.verified.cs
index 7008a3162f..a52b3dd4ab 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.VectorStoreExpirationAfter.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.VectorStoreExpirationAfter.g.verified.cs
@@ -14,8 +14,7 @@ public sealed partial class VectorStoreExpirationAfter
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("anchor")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.VectorStoreExpirationAfterAnchorJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.VectorStoreExpirationAfterAnchor Anchor { get; set; } = global::G.VectorStoreExpirationAfterAnchor.LastActiveAt;
+        public global::G.VectorStoreExpirationAfterAnchor Anchor { get; set; }
 
         /// <summary>
         /// The number of days after the anchor time that the vector store will expire.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.VectorStoreFileBatchObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.VectorStoreFileBatchObject.g.verified.cs
index fd696c4df1..5679181a3e 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.VectorStoreFileBatchObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.VectorStoreFileBatchObject.g.verified.cs
@@ -21,8 +21,7 @@ public sealed partial class VectorStoreFileBatchObject
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.VectorStoreFileBatchObjectObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.VectorStoreFileBatchObjectObject Object { get; set; } = global::G.VectorStoreFileBatchObjectObject.VectorStoreFilesBatch;
+        public global::G.VectorStoreFileBatchObjectObject Object { get; set; }
 
         /// <summary>
         /// The Unix timestamp (in seconds) for when the vector store files batch was created.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.VectorStoreFileObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.VectorStoreFileObject.g.verified.cs
index 6f909c0cf5..9ac2e807c9 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.VectorStoreFileObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.VectorStoreFileObject.g.verified.cs
@@ -23,8 +23,7 @@ public sealed partial class VectorStoreFileObject
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.VectorStoreFileObjectObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.VectorStoreFileObjectObject Object { get; set; } = global::G.VectorStoreFileObjectObject.VectorStoreFile;
+        public global::G.VectorStoreFileObjectObject Object { get; set; }
 
         /// <summary>
         /// The total vector store usage in bytes. Note that this may be different from the original file size.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.VectorStoreObject.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.VectorStoreObject.g.verified.cs
index e040dda399..4fde398640 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.VectorStoreObject.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/OpenAi/SystemTextJson/_#G.Models.VectorStoreObject.g.verified.cs
@@ -21,8 +21,7 @@ public sealed partial class VectorStoreObject
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("object")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.VectorStoreObjectObjectJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.VectorStoreObjectObject Object { get; set; } = global::G.VectorStoreObjectObject.VectorStore;
+        public global::G.VectorStoreObjectObject Object { get; set; }
 
         /// <summary>
         /// The Unix timestamp (in seconds) for when the vector store was created.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Twitch/NewtonsoftJson/_#G.Models.ExtensionBitsProductCost.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Twitch/NewtonsoftJson/_#G.Models.ExtensionBitsProductCost.g.verified.cs
index caf2502947..4b38ce4880 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Twitch/NewtonsoftJson/_#G.Models.ExtensionBitsProductCost.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Twitch/NewtonsoftJson/_#G.Models.ExtensionBitsProductCost.g.verified.cs
@@ -20,8 +20,8 @@ public sealed partial class ExtensionBitsProductCost
         ///   <br/>
         /// * bits
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ExtensionBitsProductCostType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.ExtensionBitsProductCostType Type { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Twitch/NewtonsoftJson/_#G.Models.ExtensionTransaction.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Twitch/NewtonsoftJson/_#G.Models.ExtensionTransaction.g.verified.cs
index 445c17d144..fa4c63d983 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Twitch/NewtonsoftJson/_#G.Models.ExtensionTransaction.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Twitch/NewtonsoftJson/_#G.Models.ExtensionTransaction.g.verified.cs
@@ -62,8 +62,8 @@ public sealed partial class ExtensionTransaction
         ///   <br/>
         /// * BITS\_IN\_EXTENSION
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("product_type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ExtensionTransactionProductType ProductType { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("product_type")]
+        public global::G.ExtensionTransactionProductType ProductType { get; set; }
 
         /// <summary>
         /// Contains details about the digital product.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Twitch/NewtonsoftJson/_#G.Models.ExtensionTransactionProductDataCost.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Twitch/NewtonsoftJson/_#G.Models.ExtensionTransactionProductDataCost.g.verified.cs
index 5988b75737..d24d010c8a 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Twitch/NewtonsoftJson/_#G.Models.ExtensionTransactionProductDataCost.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Twitch/NewtonsoftJson/_#G.Models.ExtensionTransactionProductDataCost.g.verified.cs
@@ -20,8 +20,8 @@ public sealed partial class ExtensionTransactionProductDataCost
         ///   <br/>
         /// * bits
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.ExtensionTransactionProductDataCostType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.ExtensionTransactionProductDataCostType Type { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Twitch/NewtonsoftJson/_#G.Models.Stream.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Twitch/NewtonsoftJson/_#G.Models.Stream.g.verified.cs
index a353f26fa0..f9bbb6a670 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Twitch/NewtonsoftJson/_#G.Models.Stream.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Twitch/NewtonsoftJson/_#G.Models.Stream.g.verified.cs
@@ -52,8 +52,8 @@ public sealed partial class Stream
         ///   <br/>
         /// If an error occurs, this field is set to an empty string.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.StreamType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.StreamType Type { get; set; }
 
         /// <summary>
         /// The stream’s title. Is an empty string if not set.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Twitch/NewtonsoftJson/_#G.Models.UpdateExtensionBitsProductBodyCost.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Twitch/NewtonsoftJson/_#G.Models.UpdateExtensionBitsProductBodyCost.g.verified.cs
index 8732703caf..75428ab78c 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Twitch/NewtonsoftJson/_#G.Models.UpdateExtensionBitsProductBodyCost.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Twitch/NewtonsoftJson/_#G.Models.UpdateExtensionBitsProductBodyCost.g.verified.cs
@@ -20,8 +20,8 @@ public sealed partial class UpdateExtensionBitsProductBodyCost
         ///   <br/>
         /// * bits — The minimum price is 1 and the maximum is 10000.
         /// </summary>
-        [global::Newtonsoft.Json.JsonProperty("type", Required = global::Newtonsoft.Json.Required.Always)]
-        public global::G.UpdateExtensionBitsProductBodyCostType Type { get; set; } = default!;
+        [global::Newtonsoft.Json.JsonProperty("type")]
+        public global::G.UpdateExtensionBitsProductBodyCostType Type { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Twitch/SystemTextJson/_#G.Models.ExtensionBitsProductCost.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Twitch/SystemTextJson/_#G.Models.ExtensionBitsProductCost.g.verified.cs
index 9ae3c8bef0..bab81d4313 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Twitch/SystemTextJson/_#G.Models.ExtensionBitsProductCost.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Twitch/SystemTextJson/_#G.Models.ExtensionBitsProductCost.g.verified.cs
@@ -23,8 +23,7 @@ public sealed partial class ExtensionBitsProductCost
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ExtensionBitsProductCostTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ExtensionBitsProductCostType Type { get; set; } = global::G.ExtensionBitsProductCostType.Bits;
+        public global::G.ExtensionBitsProductCostType Type { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Twitch/SystemTextJson/_#G.Models.ExtensionTransaction.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Twitch/SystemTextJson/_#G.Models.ExtensionTransaction.g.verified.cs
index 4d39573686..e4b3177cf8 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Twitch/SystemTextJson/_#G.Models.ExtensionTransaction.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Twitch/SystemTextJson/_#G.Models.ExtensionTransaction.g.verified.cs
@@ -72,8 +72,7 @@ public sealed partial class ExtensionTransaction
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("product_type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ExtensionTransactionProductTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ExtensionTransactionProductType ProductType { get; set; } = global::G.ExtensionTransactionProductType.BITSINEXTENSION;
+        public global::G.ExtensionTransactionProductType ProductType { get; set; }
 
         /// <summary>
         /// Contains details about the digital product.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Twitch/SystemTextJson/_#G.Models.ExtensionTransactionProductDataCost.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Twitch/SystemTextJson/_#G.Models.ExtensionTransactionProductDataCost.g.verified.cs
index 8e1ffb46eb..ad3020bf45 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Twitch/SystemTextJson/_#G.Models.ExtensionTransactionProductDataCost.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Twitch/SystemTextJson/_#G.Models.ExtensionTransactionProductDataCost.g.verified.cs
@@ -23,8 +23,7 @@ public sealed partial class ExtensionTransactionProductDataCost
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.ExtensionTransactionProductDataCostTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.ExtensionTransactionProductDataCostType Type { get; set; } = global::G.ExtensionTransactionProductDataCostType.Bits;
+        public global::G.ExtensionTransactionProductDataCostType Type { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Twitch/SystemTextJson/_#G.Models.Stream.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Twitch/SystemTextJson/_#G.Models.Stream.g.verified.cs
index 023a9f46ae..3ea0a95a09 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Twitch/SystemTextJson/_#G.Models.Stream.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Twitch/SystemTextJson/_#G.Models.Stream.g.verified.cs
@@ -60,8 +60,7 @@ public sealed partial class Stream
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.StreamTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.StreamType Type { get; set; } = global::G.StreamType.Live;
+        public global::G.StreamType Type { get; set; }
 
         /// <summary>
         /// The stream’s title. Is an empty string if not set.
diff --git a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Twitch/SystemTextJson/_#G.Models.UpdateExtensionBitsProductBodyCost.g.verified.cs b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Twitch/SystemTextJson/_#G.Models.UpdateExtensionBitsProductBodyCost.g.verified.cs
index 57b79021b2..d98eb8c94b 100644
--- a/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Twitch/SystemTextJson/_#G.Models.UpdateExtensionBitsProductBodyCost.g.verified.cs
+++ b/src/tests/OpenApiGenerator.SnapshotTests/Snapshots/Twitch/SystemTextJson/_#G.Models.UpdateExtensionBitsProductBodyCost.g.verified.cs
@@ -23,8 +23,7 @@ public sealed partial class UpdateExtensionBitsProductBodyCost
         /// </summary>
         [global::System.Text.Json.Serialization.JsonPropertyName("type")]
         [global::System.Text.Json.Serialization.JsonConverter(typeof(global::OpenApiGenerator.JsonConverters.UpdateExtensionBitsProductBodyCostTypeJsonConverter))]
-        [global::System.Text.Json.Serialization.JsonRequired]
-        public required global::G.UpdateExtensionBitsProductBodyCostType Type { get; set; } = global::G.UpdateExtensionBitsProductBodyCostType.Bits;
+        public global::G.UpdateExtensionBitsProductBodyCostType Type { get; set; }
 
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema