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 ('26f602682c64ae66f51650242ff3b454','0','216.73.216.186','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1759321803','ct_mail.php?Page=361089812','0','0','')
mysql error: Duplicate entry '26f602682c64ae66f51650242ff3b454' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.42-log
php version: 5.6.40
Date: 01.10.2025 @ 14:30
Script: /ct_mail.php?Page=361089812
Referer: