SQL-DATABASE ERROR

Database error in WoltLab Burning Board: Invalid SQL: SELECT u.userid, u.username, u.invisible, u.receivepm, u.lastactivity, uf.* FROM bb11_users u, bb11_groups g LEFT JOIN bb11_userfields uf ON (u.userid=uf.userid) WHERE u.groupid = g.groupid AND g.ismod=1 ORDER BY u.username ASC
mysql error: Unknown column 'u.userid' in 'on clause'
mysql error number: 1054
Date: 15.04.2021 @ 07:04
Script: /forum/team.php?sid=85f8359dca0df73d8b3419a3c6c65228
Referer: