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 ('9773243cf8573f1554d7c04f2633c84c','0','3.144.237.77','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715701031','register.php?sid=844e2f1abbf4216c0661f24ea03fdb41','0','0','')
mysql error: Duplicate entry '9773243cf8573f1554d7c04f2633c84c' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 14.05.2024 @ 17:37
Script: /register.php?sid=844e2f1abbf4216c0661f24ea03fdb41
Referer: http://wehrbauten.de/register.php?sid=844e2f1abbf4216c0661f24ea03fdb41