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 ('e546b6a233e1b332da1b19a7473df86f',',1502,1509','1','lastpost','desc','1714824737','0','3.21.100.34')
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 @ 14:12
Script: /search.php?action=user&userid=59&sid=a1b360eac22ddb8dfa6b9482fd0f1597
Referer: