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 ('b4ce69c06163c5393198b82acf4c6d71','0','3.21.247.221','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1734860563','usercp.php?action=addsubscription&boardid=6','0','0','')
mysql error: Duplicate entry 'b4ce69c06163c5393198b82acf4c6d71' for key 'PRIMARY'
mysql error number: 1062
mysql version: 8.0.11
php version: 5.6.10
Date: 22.12.2024 @ 10:42
Script: /usercp.php?action=addsubscription&boardid=6
Referer: http://gttempel.de/usercp.php?action=addsubscription&boardid=6