diff --git a/lightrag/lightrag.py b/lightrag/lightrag.py
index fbcfd58d..ff9ce8b0 100644
--- a/lightrag/lightrag.py
+++ b/lightrag/lightrag.py
@@ -3302,9 +3302,7 @@ class LightRAG:
                         pipeline_status["history_messages"].append(cache_log_message)
                     log_message = cache_log_message
                 except Exception as cache_delete_error:
-                    log_message = (
-                        f"Failed to delete LLM cache for document {doc_id}: {cache_delete_error}"
-                    )
+                    log_message = f"Failed to delete LLM cache for document {doc_id}: {cache_delete_error}"
                     logger.error(log_message)
                     logger.error(traceback.format_exc())
                     async with pipeline_status_lock: