diff --git a/openapi.yaml b/openapi.yaml
index e19f0a910..f8cdde353 100644
--- a/openapi.yaml
+++ b/openapi.yaml
@@ -105,12 +105,6 @@ paths:
       responses:
         '200':
           description: Success
-        '500':
-          description: Internal server error
-          content:
-            application/json:
-              schema:
-                $ref: '#/components/schemas/ErrorResponse'
           content:
             application/json:
               schema:
@@ -198,18 +192,18 @@ paths:
       responses:
         '200':
           description: Success
-        '500':
-          description: Internal server error
-          content:
-            application/json:
-              schema:
-                $ref: '#/components/schemas/ErrorResponse'
           content:
             application/json:
               schema:
                 type: array
                 items:
                   $ref: '#/components/schemas/HistoryItem'
+        '500':
+          description: Internal server error
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
     post:
       tags:
       - workflow