SQL-DATABASE ERROR

Database error in WoltLab Burning Board (2.3.6): Invalid SQL: SELECT g.groupid, g.title, uf.*, u.userid, u.username, u.invisible, u.receivepm, u.lastactivity, u.email, u.showemail, u.usercanemail,gl.userid AS groupleader FROM bb1_groups g LEFT JOIN bb1_user2groups USING (groupid) LEFT JOIN bb1_users u USING (userid) LEFT JOIN bb1_userfields uf USING (userid) LEFT JOIN bb1_groupleaders gl ON (gl.userid=u.userid AND gl.groupid=g.groupid) WHERE g.showonteam = 1 ORDER BY g.showorder, g.groupid, u.username
mysql error: Table 'usr_web21_1.bb1_user2groups' doesn't exist
mysql error number: 1146
mysql version: 10.0.32-MariaDB-0+deb8u1
php version: 5.6.33-0+deb8u1
Date: 26.04.2024 @ 16:07
Script: /team.php?sid=f88bbaa41a5aefd7358ac59ac7441679
Referer: