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 ('6491ecab00f9af5f8c26100ddb41afa5','0','3.145.201.17','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715726339','board.php?boardid=38&sid=f872a4b02f1bb54fff56ee7d0b823d42','0','0','')
mysql error: Duplicate entry '6491ecab00f9af5f8c26100ddb41afa5' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 15.05.2024 @ 00:38
Script: /board.php?boardid=38&sid=f872a4b02f1bb54fff56ee7d0b823d42
Referer: http://wehrbauten.de/board.php?boardid=38&sid=f872a4b02f1bb54fff56ee7d0b823d42