SQL-DATABASE ERROR

Database error in WoltLab Burning Board: Invalid SQL: SELECT u.userid, u.username, u.invisible, u.receivepm, u.lastactivity, uf.* FROM bb344_users u, bb344_groups g LEFT JOIN bb344_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: 21.07.2018 @ 13:35
Script: /team.php?sid=f5be71bf5acb95d0e63d824120964a29
Referer: