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 ('6a37d9f6b3a60f3c679fc6f06e73b396',',628,656,673,754,852,866,868,928,931,949,954,965,967,988,1062,1073,1119,1127,1142,1158,1209,1214,1244,1349,1416,1453','1','lastpost','desc','1714879519','0','3.15.10.137')
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: 05.05.2024 @ 05:25
Script: /search.php?action=user&userid=23&sid=4ddf81d33878cd34cb196a6ebbf06915
Referer: