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 ('0fafbcf67b62a4cb4ca13eb75c60452f','0','3.139.240.142','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714802475','board.php?boardid=291&sid=b2894b24dd066a7fe7d1a2ba9d1c1419','0','0','')
mysql error: Duplicate entry '0fafbcf67b62a4cb4ca13eb75c60452f' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 04.05.2024 @ 08:01
Script: /board.php?boardid=291&sid=b2894b24dd066a7fe7d1a2ba9d1c1419
Referer: http://wehrbauten.de/board.php?boardid=291&sid=b2894b24dd066a7fe7d1a2ba9d1c1419