diff --git a/packages/twenty-server/src/engine/workspace-manager/workspace-sync-metadata/custom-objects/custom.object-metadata.ts b/packages/twenty-server/src/engine/workspace-manager/workspace-sync-metadata/custom-objects/custom.object-metadata.ts
index 89e4c5a28d9f..b7daff7e9ea2 100644
--- a/packages/twenty-server/src/engine/workspace-manager/workspace-sync-metadata/custom-objects/custom.object-metadata.ts
+++ b/packages/twenty-server/src/engine/workspace-manager/workspace-sync-metadata/custom-objects/custom.object-metadata.ts
@@ -97,7 +97,7 @@ export class CustomObjectMetadata extends BaseObjectMetadata {
   })
   @RelationMetadata({
     type: RelationMetadataType.ONE_TO_MANY,
-    inverseSideTarget: () => AttachmentObjectMetadata,
+    inverseSideTarget: () => EventObjectMetadata,
     onDelete: RelationOnDeleteAction.CASCADE,
   })
   @IsNullable()