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 ('295a6a2a8c30b6378cd547716224ab3d',',1502,1509','1','lastpost','desc','1715126435','0','3.137.218.215')
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: 08.05.2024 @ 02:00
Script: /search.php?action=user&userid=59&sid=f2c1bb575d0c8713f0cae02e2e9314f0
Referer: