diff --git a/src/StreetNameRegistry.Projections.Integration/Converters/StreetNameMapper.cs b/src/StreetNameRegistry.Projections.Integration/Converters/StreetNameMapper.cs
index f5ec41e7b..73ee068f7 100644
--- a/src/StreetNameRegistry.Projections.Integration/Converters/StreetNameMapper.cs
+++ b/src/StreetNameRegistry.Projections.Integration/Converters/StreetNameMapper.cs
@@ -40,6 +40,8 @@ public static void UpdateNameByLanguage(this StreetNameVersion item, Language? l
                 case Language.English:
                     item.NameEnglish = value;
                     break;
+                case null:
+                    break;
                 default: throw new InvalidOperationException($"Name language '{language}' has no mapping.");
             }
         }
@@ -60,6 +62,8 @@ public static void UpdateHomonymAdditionByLanguage(this StreetNameVersion item,
                 case Language.English:
                     item.HomonymAdditionEnglish = value;
                     break;
+                case null:
+                    break;
                 default: throw new InvalidOperationException($"HomonymAddition language '{language}' has no mapping.");
             }
         }