diff --git a/backend/open_webui/main.py b/backend/open_webui/main.py
index b7ec53ab7d..7a3ce18b9b 100644
--- a/backend/open_webui/main.py
+++ b/backend/open_webui/main.py
@@ -1822,6 +1822,9 @@ async def chat_completion(
             if not assistant_message_id:
                 continue
 
+            if fallback_model is not None and target_model_id == model_id:
+                target_model_id = fallback_model['id']
+
             # Per-model metadata: own message_id + model
             per_model_metadata = {
                 **metadata,