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 ('4ff64d1edfe07b1c962f285c11c79a96','0','216.73.216.51','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1748150402','ct_mail.php?Page=847831369','0','0','')
mysql error: Duplicate entry '4ff64d1edfe07b1c962f285c11c79a96' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.42-log
php version: 5.6.40
Date: 25.05.2025 @ 07:20
Script: /ct_mail.php?Page=847831369
Referer: