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 ('8fc6f91c63029328b7f931692f953f65',',1409,1411,1450,1496,1499','1','lastpost','desc','1715205287','0','3.144.35.148')
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: 08.05.2024 @ 23:54
Script: /search.php?action=user&userid=63&sid=f74e1232afd9db04dc72a78fe372a1c1
Referer: