diff --git a/backend/open_webui/utils/middleware.py b/backend/open_webui/utils/middleware.py
index 0f40ce594..4238254a7 100644
--- a/backend/open_webui/utils/middleware.py
+++ b/backend/open_webui/utils/middleware.py
@@ -479,7 +479,6 @@ def handle_responses_streaming_event(
                 pass
             else:
                 item["content"].append(part)
-                item["content"].append(part)
             return new_output, None
         return current_output, None