SQL-DATABASE ERROR

Database error in WoltLab Burning Board (2.3.6): Invalid SQL: INSERT INTO bb1_sessions SET sessionhash='0', userid='275', ipaddress='localhost', useragent='n/a', lastactivity='1714021178', request_uri='index.php'
mysql error: Duplicate entry '0' for key 'PRIMARY'
mysql error number: 1062
mysql version: 10.5.23-MariaDB-1:10.5.23+maria~ubu2004-log
php version: 7.0.33-nmm9
Date: 25.04.2024 @ 06:59
Script: /wbb2/board.php?boardid=423&sid=f363635c63883417fa05154a6ecf45bd
Referer: http://loresgrafikzauberland.de/wbb2/board.php?boardid=423&sid=f363635c63883417fa05154a6ecf45bd