SQL-DATABASE ERROR

Database error in WoltLab Burning Board (): Invalid SQL: SELECT threadid, if (voted>0 AND voted>=0,votepoints/voted,0) AS vote FROM bb1_threads WHERE boardid='13' AND visible = 1 AND important < 2 ORDER BY important DESC, , lastposttime DESC LIMIT 0, 20
mysql error: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ' lastposttime DESC LIMIT 0, 20' at line 1
mysql error number: 1064
mysql version: 5.5.33-MariaDB
php version: 5.6.19
Date: 27.04.2024 @ 15:24
Script: /board.php?boardid=13&sid=d734b7ad0a9c7eba264f76dc35093d85
Referer: