diff --git a/bot.py b/bot.py
index f8e82d5..de9fbc5 100644
--- a/bot.py
+++ b/bot.py
@@ -142,6 +142,8 @@ async def main():
                     max_buy_num = alarm_info.base_asset_scale
                 else:
                     max_buy_num = alarm_info.quote_asset_scale
+
+                max_buy_num = min(max_buy_num, alarm.remain_scale)
             except Exception as e:
                 logger.error(f"Error in estimate wind {e}")
                 continue
diff --git a/mariadb_connector.py b/mariadb_connector.py
index 24f43a8..a946747 100644
--- a/mariadb_connector.py
+++ b/mariadb_connector.py
@@ -138,10 +138,7 @@ async def update_alarm_to_db(alarms: list[Alarm]):
                 VALUES (%s, %s, %s, %s, %s, %s)
                 ON DUPLICATE KEY UPDATE
                 state = VALUES(state),
-                price = VALUES(price),
-                is_mine = VALUES(is_mine),
-                remain_scale = VALUES(remain_scale),
-                created_at = VALUES(created_at)
+                remain_scale = VALUES(remain_scale)
             """
             insert_list = []
             for alarm in alarms: