diff --git a/lightrag/lightrag.py b/lightrag/lightrag.py
index 03699e08..55731d7a 100644
--- a/lightrag/lightrag.py
+++ b/lightrag/lightrag.py
@@ -1506,12 +1506,12 @@ class LightRAG:
 
                                 # Prevent memory growth: keep only latest 5000 messages when exceeding 10000
                                 if len(pipeline_status["history_messages"]) > 10000:
-                                    pipeline_status["history_messages"] = (
-                                        pipeline_status["history_messages"][-5000:]
-                                    )
                                     logger.info(
                                         f"Trimming pipeline history from {len(pipeline_status['history_messages'])} to 5000 messages"
                                     )
+                                    pipeline_status["history_messages"] = (
+                                        pipeline_status["history_messages"][-5000:]
+                                    )
 
                             # Get document content from full_docs
                             content_data = await self.full_docs.get_by_id(doc_id)