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 ('a21bef28eb4b63fd2f4ba67c74f17b38',',62,61,63,83,97,103,107,108,110,125,126,130,131,132,136,157,161,199,226,234,236,241,254,266,321,327,361,362,376,389,390,413,432,433,434,554,556,567,577,581,589,598,608,604,609,613,672,681,689,690,691,696,697,722,745,748,761,775,784,823,824,830,832,833,887,890,903,912,920,922,1025,1027,1034,1068,1132,1167,1179,1215,1216,1246,1266,1302,1353,1371,1428,1429,1451,1459,1467,1483,1488,1511,1512','1','lastpost','desc','1713540116','0','3.128.199.210')
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: 19.04.2024 @ 17:21
Script: /search.php?action=user&userid=15&sid=f65ed60d046a3ae25d190843d544ec30
Referer: