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 ('8639b1ed79336667ab04a4976fdfbffa','0','18.116.85.72','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714760747','board.php?boardid=768&sid=42d2fb9494ac3d159f8bfd3a9ecf7b03','0','0','')
mysql error: Duplicate entry '8639b1ed79336667ab04a4976fdfbffa' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 03.05.2024 @ 20:25
Script: /board.php?boardid=768&sid=42d2fb9494ac3d159f8bfd3a9ecf7b03
Referer: http://wehrbauten.de/board.php?boardid=768&sid=42d2fb9494ac3d159f8bfd3a9ecf7b03