SQL-DATABASE ERROR

Database error in WoltLab Burning Board (2.3.6): Invalid SQL: INSERT INTO bb1_sessions (sessionhash,userid,ipaddress,useragent,lastactivity,request_uri,styleid,langid,authentificationcode) VALUES ('5998edb1dc58dbe84609fc6a841073a3','0','18.188.70.255','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715324659','board.php?boardid=95&page=1&daysprune=1000&sortfield=topic&sortorder=ASC&sid=496499f8ce1cb9ac5336826a6b4541fb','0','0','')
mysql error: Duplicate entry '5998edb1dc58dbe84609fc6a841073a3' for key 'PRIMARY'
mysql error number: 1062
mysql version: 10.11.5-MariaDB-deb10-keen
php version: 5.3.29
Date: 10.05.2024 @ 09:04
Script: /board.php?boardid=95&page=1&daysprune=1000&sortfield=topic&sortorder=ASC&sid=496499f8ce1cb9ac5336826a6b4541fb
Referer: