diff --git a/aider_gitea/gitea_client.py b/aider_gitea/gitea_client.py
index 751b2ea..4133096 100644
--- a/aider_gitea/gitea_client.py
+++ b/aider_gitea/gitea_client.py
@@ -167,7 +167,7 @@ class GiteaClient:
 
         response = self.session.post(url, json=json_data)
         # If a pull request for this head/base already exists, return it instead of crashing
-        if response.status_code == 422:
+        if response.status_code == 409:
             logger.warning(
                 'Pull request already exists for head %s and base %s', head, base,
             )