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 ('6cae7a0f21c4b66fef2c6d51a7add65c','0','216.73.216.56','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1759022547','attachment.php?attachmentid=1903948','0','0','')
mysql error: Duplicate entry '6cae7a0f21c4b66fef2c6d51a7add65c' for key 'PRIMARY'
mysql error number: 1062
mysql version: 10.6.22-MariaDB-0ubuntu0.22.04.1-log
php version: 5.6.40-nmm10
Date: 28.09.2025 @ 03:22
Script: /forum/attachment.php?attachmentid=1903948
Referer: