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 ('7e4fa85904d5dec786c3d7d749bde5cb',',1502,1509','1','lastpost','desc','1714357566','0','18.116.85.72')
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: 29.04.2024 @ 04:26
Script: /search.php?action=user&userid=59&sid=2e4dc89c9e74b343b1043bd2e9857307
Referer: