SQL-DATABASE ERROR

Database error in WoltLab Burning Board: Invalid SQL: SELECT u.userid, u.username, u.invisible, u.receivepm, u.lastactivity, uf.* FROM bb2_users u, bb2_groups g LEFT JOIN bb2_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: 18.05.2024 @ 17:08
Script: /friebeforum/team.php?sid=e8fe2b37a18c6cd4e5b2da001eb67d56
Referer: http://www.ekkehard-friebe.de/friebeforum/team.php?sid=e8fe2b37a18c6cd4e5b2da001eb67d56