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 ('26e0e4c3c510fbdb8a85b72128497198',',1409,1411,1450,1496,1499','1','lastpost','desc','1714856457','0','3.22.181.81')
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: 04.05.2024 @ 23:00
Script: /search.php?action=user&userid=63&sid=4b2376f6d12d69fd86562a67b42981f0
Referer: