Remove the tracestack when the collection already exists

backend/apps/rag/main.py

@@ -978,10 +978,11 @@ def store_docs_in_vector_db(docs, collection_name, overwrite: bool = False) -> b
 
         return True
     except Exception as e:
-        log.exception(e)
         if e.__class__.__name__ == "UniqueConstraintError":
             return True
 
+        log.exception(e)
+
         return False