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 ('9bfdd551a4253976800512c6d7d52cb7','0','18.216.123.120','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715176500','board.php?boardid=692&sid=482859dfb8a363d738a020a98a758c02','0','0','')
mysql error: Duplicate entry '9bfdd551a4253976800512c6d7d52cb7' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 08.05.2024 @ 15:55
Script: /board.php?boardid=692&sid=482859dfb8a363d738a020a98a758c02
Referer: http://wehrbauten.de/board.php?boardid=692&sid=482859dfb8a363d738a020a98a758c02