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 ('ab6958dfff21ef28d5d3b5eda600bacf','0','3.142.195.204','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715468901','board.php?boardid=407&sid=106e51cd19d0f0d8ff173fae358a8fe9','0','0','')
mysql error: Duplicate entry 'ab6958dfff21ef28d5d3b5eda600bacf' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 12.05.2024 @ 01:08
Script: /board.php?boardid=407&sid=106e51cd19d0f0d8ff173fae358a8fe9
Referer: http://wehrbauten.de/board.php?boardid=407&sid=106e51cd19d0f0d8ff173fae358a8fe9