Thank you for your help. We clicked the upgrade button before we backed up the database, so we cannot back to the previous version...
And we got the following error message:
mysql> ALTER TABLE `ips_core_members` DROP COLUMN `badge_count`;
ERROR 1091 (42000): Can't DROP 'badge_count'; check that column/key exists
Currently, our admin CP cannot be accessed, it is 504 now😥