SQL-DATABASE ERROR

Database error in WoltLab Burning Board (2.3.6): Invalid SQL: INSERT INTO bb1_searchs (searchhash,postids,showposts,sortby,sortorder,searchtime,userid,ipaddress) VALUES ('8ce647bf3e179765d052cde5b6a96b1f',',1409,1411,1450,1496,1499','1','lastpost','desc','1715142301','0','18.118.1.158')
mysql error: Field 'searchstring' doesn't have a default value
mysql error number: 1364
mysql version: 10.3.39-MariaDB-1:10.3.39+maria~ubu2004
php version: 5.2.17
Date: 08.05.2024 @ 06:25
Script: /search.php?action=user&userid=63&sid=e2c8a6bc7fea29ec262da761e3c72a6a
Referer: