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 ('40f739b9f040731f727a91ec883aa545','0','18.224.246.203','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714794150','board.php?boardid=723&sid=c01ad124dc7477252649f9621c6b4b60','0','0','')
mysql error: Duplicate entry '40f739b9f040731f727a91ec883aa545' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 04.05.2024 @ 05:42
Script: /board.php?boardid=723&sid=c01ad124dc7477252649f9621c6b4b60
Referer: http://wehrbauten.de/board.php?boardid=723&sid=c01ad124dc7477252649f9621c6b4b60