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 ('5188d83b5e3ea902bc523b8a2393bbec',',1502,1509','1','lastpost','desc','1714766940','0','18.188.108.54')
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: 03.05.2024 @ 22:09
Script: /search.php?action=user&userid=59&sid=ea7857b226c936c3946a3968c66e200f
Referer: