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 ('6e87f2983863121f69f84d9d7ebfb0c2','0','216.73.216.93','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1750108621','ct_mail.php?Page=509010626','0','0','')
mysql error: Duplicate entry '6e87f2983863121f69f84d9d7ebfb0c2' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.42-log
php version: 5.6.40
Date: 16.06.2025 @ 23:17
Script: /ct_mail.php?Page=509010626
Referer: