diff --git a/open-api/rest-catalog-open-api.py b/open-api/rest-catalog-open-api.py
index 7bd97b69885f..e13aeeeec5bf 100644
--- a/open-api/rest-catalog-open-api.py
+++ b/open-api/rest-catalog-open-api.py
@@ -171,7 +171,6 @@ class SortOrder(BaseModel):
 
 class Summary(BaseModel):
     operation: Literal['append', 'replace', 'overwrite', 'delete']
-    additionalProperties: Optional[str] = None
 
 
 class Snapshot(BaseModel):
diff --git a/open-api/rest-catalog-open-api.yaml b/open-api/rest-catalog-open-api.yaml
index 161d5e0fcff8..67dc235d3b20 100644
--- a/open-api/rest-catalog-open-api.yaml
+++ b/open-api/rest-catalog-open-api.yaml
@@ -1986,8 +1986,8 @@ components:
             operation:
               type: string
               enum: ["append", "replace", "overwrite", "delete"]
-            additionalProperties:
-              type: string
+          additionalProperties:
+            type: string
         schema-id:
           type: integer