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 ('0c88cccf532754e12f8104ac36e757cb','0','18.223.205.84','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715584422','register.php?sid=af33bb134106bd16e03bc2b0ed2eaef6','0','0','')
mysql error: Duplicate entry '0c88cccf532754e12f8104ac36e757cb' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 13.05.2024 @ 09:13
Script: /register.php?sid=af33bb134106bd16e03bc2b0ed2eaef6
Referer: http://wehrbauten.de/register.php?sid=af33bb134106bd16e03bc2b0ed2eaef6