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 ('8a0a2f764c993b1199f623daa96df2c5','0','216.73.216.185','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1756495082','ct_mail.php?Page=759428647','0','0','')
mysql error: Duplicate entry '8a0a2f764c993b1199f623daa96df2c5' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.42-log
php version: 5.6.40
Date: 29.08.2025 @ 21:18
Script: /ct_mail.php?Page=759428647
Referer: