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 ('2a437701fa2870519d007dd6b34a0af2','0','216.73.216.112','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1757690162','ct_mail.php?Page=550784077','0','0','')
mysql error: Duplicate entry '2a437701fa2870519d007dd6b34a0af2' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.42-log
php version: 5.6.40
Date: 12.09.2025 @ 17:16
Script: /ct_mail.php?Page=550784077
Referer: