SQL-DATABASE ERROR

Database error in WoltLab Burning Board (2.3.6 pl2): Invalid SQL: INSERT INTO bb1_sessions (sessionhash,userid,ipaddress,useragent,lastactivity,request_uri,styleid,langid,authentificationcode) VALUES ('b6b985b5e132262a474bcf365ac960c1','0','18.219.43.26','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1745223096','usercp.php?action=addsubscription&threadid=1639','0','0','')
mysql error: Duplicate entry 'b6b985b5e132262a474bcf365ac960c1' for key 'PRIMARY'
mysql error number: 1062
mysql version: 8.0.11
php version: 5.6.10
Date: 21.04.2025 @ 10:11
Script: /usercp.php?action=addsubscription&threadid=1639
Referer: http://gttempel.de/usercp.php?action=addsubscription&threadid=1639