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 ('951b8e86aad6023fa8d4b74679944a2f','0','3.133.147.87','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714040516','board.php?boardid=223&sid=30703725d9af35b433f47258ba63820c','0','0','')
mysql error: Duplicate entry '951b8e86aad6023fa8d4b74679944a2f' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 25.04.2024 @ 12:21
Script: /board.php?boardid=223&sid=30703725d9af35b433f47258ba63820c
Referer: http://wehrbauten.de/board.php?boardid=223&sid=30703725d9af35b433f47258ba63820c