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 ('18685c985d127338a77f87384eaf1c1c','0','216.73.216.111','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1754430666','ct_mail.php?Page=451448069','0','0','')
mysql error: Duplicate entry '18685c985d127338a77f87384eaf1c1c' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.33-0ubuntu0.16.04.1
php version: 5.6.40
Date: 05.08.2025 @ 23:51
Script: /ct_mail.php?Page=451448069
Referer: