diff --git a/api/app/core/memory/agent/langgraph_graph/routing/write_router.py b/api/app/core/memory/agent/langgraph_graph/routing/write_router.py
index 3a225319..a896130f 100644
--- a/api/app/core/memory/agent/langgraph_graph/routing/write_router.py
+++ b/api/app/core/memory/agent/langgraph_graph/routing/write_router.py
@@ -181,7 +181,7 @@ async def window_dialogue(end_user_id, langchain_messages, memory_config, scope)
             {
                 "end_user_id": str(end_user_id),
                 "message": redis_messages,
-                "config_id": config_id,
+                "config_id": str(config_id),
                 "storage_type": AgentMemory_Long_Term.STORAGE_NEO4J,
                 "user_rag_memory_id": ""
             }