diff --git a/backend/app.py b/backend/app.py
index f78fdc6..49dad10 100644
--- a/backend/app.py
+++ b/backend/app.py
@@ -3108,7 +3108,8 @@ def api_member_history(phone):
                 } for i in interests]
                 
         except Exception as e:
-            logging.warning(f"마일리지 조회 실패: {e}")
+            import traceback
+            logging.error(f"마일리지 조회 실패: {e}\n{traceback.format_exc()}")
         finally:
             # SQLite 연결 닫기
             if sqlite_conn: