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: 15.05.2024 @ 18:24
Script: /friebeforum/team.php?sid=6736d6b5b864e2b81b64108e9f76a11f
Referer: http://www.ekkehard-friebe.de/friebeforum/team.php?sid=6736d6b5b864e2b81b64108e9f76a11f