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 ('2504df52ab1b5a72b78f17044429cce7','0','3.145.37.92','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715751439','board.php?boardid=687&sid=ec427fd38df1237079274ac0796b7e3d','0','0','')
mysql error: Duplicate entry '2504df52ab1b5a72b78f17044429cce7' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 15.05.2024 @ 07:37
Script: /board.php?boardid=687&sid=ec427fd38df1237079274ac0796b7e3d
Referer: http://wehrbauten.de/board.php?boardid=687&sid=ec427fd38df1237079274ac0796b7e3d