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: 22.09.2018 @ 10:07
Script: /team.php?sid=7bb8e2aa1343a7515d70df15a80e6d9f
Referer: