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 ('f6f2fbe66668fc74264398397287ed6d',',1502,1509','1','lastpost','desc','1714613556','0','18.224.214.215')
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: 02.05.2024 @ 03:32
Script: /search.php?action=user&userid=59&sid=aac707317b43983756da4a3824447c4b
Referer: