diff --git a/packages/server/src/integrations/utils/utils.ts b/packages/server/src/integrations/utils/utils.ts
index aac3f5f74a..6b99ec1bed 100644
--- a/packages/server/src/integrations/utils/utils.ts
+++ b/packages/server/src/integrations/utils/utils.ts
@@ -376,6 +376,7 @@ function copyExistingPropsOver(
         case FieldType.ARRAY:
         case FieldType.ATTACHMENTS:
         case FieldType.ATTACHMENT_SINGLE:
+        case FieldType.SIGNATURE:
         case FieldType.JSON:
         case FieldType.BB_REFERENCE:
           shouldKeepSchema = keepIfType(FieldType.JSON, FieldType.STRING)