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 ('12cd5f4d33361b1ec6a6dead85aa6fcb','0','3.135.213.214','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715524382','usercp.php?action=addsubscription&threadid=2429&sid=ee5af16adffb19f284e5d82e059c2f98','0','0','')
mysql error: Duplicate entry '12cd5f4d33361b1ec6a6dead85aa6fcb' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 12.05.2024 @ 16:33
Script: /usercp.php?action=addsubscription&threadid=2429&sid=ee5af16adffb19f284e5d82e059c2f98
Referer: http://wehrbauten.de/usercp.php?action=addsubscription&threadid=2429&sid=ee5af16adffb19f284e5d82e059c2f98