diff --git a/dist/compatible/openapi-3.0.yaml b/dist/compatible/openapi-3.0.yaml
index d62894e..aeb9960 100644
--- a/dist/compatible/openapi-3.0.yaml
+++ b/dist/compatible/openapi-3.0.yaml
@@ -780,6 +780,8 @@ components:
       type: object
     Errors:
       properties:
+        data:
+          $ref: '#/components/schemas/ErrorsData'
         errors:
           items:
             $ref: '#/components/schemas/Error'
@@ -787,6 +789,12 @@ components:
       required:
       - errors
       type: object
+    ErrorsData:
+      properties:
+        user:
+          pattern: dummy
+          type: string
+      type: object
     ExtMediaAvailability:
       properties:
         reason:
@@ -6578,8 +6586,7 @@ paths:
           content:
             application/json:
               schema:
-                oneOf:
-                - $ref: '#/components/schemas/OtherResponse'
+                $ref: '#/components/schemas/OtherResponse'
           description: Successful operation
       tags:
       - other
diff --git a/dist/compatible_discriminator/openapi-3.0.yaml b/dist/compatible_discriminator/openapi-3.0.yaml
index fde043a..b0f6efe 100644
--- a/dist/compatible_discriminator/openapi-3.0.yaml
+++ b/dist/compatible_discriminator/openapi-3.0.yaml
@@ -780,6 +780,8 @@ components:
       type: object
     Errors:
       properties:
+        data:
+          $ref: '#/components/schemas/ErrorsData'
         errors:
           items:
             $ref: '#/components/schemas/Error'
@@ -787,6 +789,12 @@ components:
       required:
       - errors
       type: object
+    ErrorsData:
+      properties:
+        user:
+          pattern: dummy
+          type: string
+      type: object
     ExtMediaAvailability:
       properties:
         reason:
@@ -6520,8 +6528,7 @@ paths:
           content:
             application/json:
               schema:
-                oneOf:
-                - $ref: '#/components/schemas/OtherResponse'
+                $ref: '#/components/schemas/OtherResponse'
           description: Successful operation
       tags:
       - other
diff --git a/dist/docs/openapi-3.0.yaml b/dist/docs/openapi-3.0.yaml
index 2af419f..8c6ddc3 100644
--- a/dist/docs/openapi-3.0.yaml
+++ b/dist/docs/openapi-3.0.yaml
@@ -780,6 +780,8 @@ components:
       type: object
     Errors:
       properties:
+        data:
+          $ref: '#/components/schemas/ErrorsData'
         errors:
           items:
             $ref: '#/components/schemas/Error'
@@ -787,6 +789,12 @@ components:
       required:
       - errors
       type: object
+    ErrorsData:
+      properties:
+        user:
+          pattern: dummy
+          type: string
+      type: object
     ExtMediaAvailability:
       properties:
         reason:
@@ -8687,8 +8695,7 @@ paths:
           content:
             application/json:
               schema:
-                oneOf:
-                - $ref: '#/components/schemas/OtherResponse'
+                $ref: '#/components/schemas/OtherResponse'
           description: Successful operation
       tags:
       - other
diff --git a/src/openapi/paths/other.yaml b/src/openapi/paths/other.yaml
index 7bab3ec..40820dd 100644
--- a/src/openapi/paths/other.yaml
+++ b/src/openapi/paths/other.yaml
@@ -14,8 +14,7 @@ paths:
           content:
             application/json:
               schema:
-                oneOf:
-                  - $ref: "#/components/schemas/OtherResponse"
+                $ref: "#/components/schemas/OtherResponse"
       tags:
         - "other"
 
diff --git a/src/openapi/response/error.yaml b/src/openapi/response/error.yaml
index 7006c7a..a37f631 100644
--- a/src/openapi/response/error.yaml
+++ b/src/openapi/response/error.yaml
@@ -15,6 +15,15 @@ components:
           type: array
           items:
             $ref: "#/components/schemas/Error"
+        data:
+          $ref: "#/components/schemas/ErrorsData"
+
+    ErrorsData:
+      type: object
+      properties:
+        user:
+          type: string # always null
+          pattern: "dummy"
 
     Error:
       type: object
diff --git a/test/python/test_serialize_guest.py b/test/python/test_serialize_guest.py
index 5079922..21a1fe6 100644
--- a/test/python/test_serialize_guest.py
+++ b/test/python/test_serialize_guest.py
@@ -2,6 +2,7 @@ import json
 from pathlib import Path
 
 import openapi_client as pt
+import urllib3
 
 
 def get_kwargs(key, additional):
@@ -33,9 +34,17 @@ if __name__ == "__main__":
             "GuestToken": cookies["gt"],
         },
     )
+
+    latest_user_agent_res = urllib3.PoolManager().request(
+        "GET",
+        "https://raw.githubusercontent.com/fa0311/latest-user-agent/main/output.json",
+    )
+
+    latest_user_agent = json.loads(latest_user_agent_res.data.decode("utf-8"))
+
     api_conf.access_token = "AAAAAAAAAAAAAAAAAAAAANRILgAAAAAAnNwIzUejRCOuH5E6I8xnZz4puTs%3D1Zv7ttfk8LF81IUq16cHjhLTvJu4FA33AGWWjCpTnA"
     api_client = pt.ApiClient(configuration=api_conf, cookie=cookies_str)
-    api_client.user_agent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36"
+    api_client.user_agent = latest_user_agent["chrome-fetch"]
 
     pt.TweetApi(api_client).get_user_tweets_with_http_info(
         **get_kwargs("UserTweets", {}),