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 ('7a116585f638dad481b10bad37b46785','0','3.21.158.148','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714538433','register.php?sid=8261a577080917a448943897a23b6ea9','0','0','')
mysql error: Duplicate entry '7a116585f638dad481b10bad37b46785' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 01.05.2024 @ 06:40
Script: /register.php?sid=8261a577080917a448943897a23b6ea9
Referer: http://wehrbauten.de/register.php?sid=8261a577080917a448943897a23b6ea9