SQL-DATABASE ERROR

Database error in WoltLab Burning Board (2.3.6pl2): Invalid SQL: INSERT INTO bb1_sessions (sessionhash,userid,ipaddress,useragent,lastactivity,request_uri,styleid,langid,authentificationcode) VALUES ('6bb08759bfb98e8beb94e3a92cf6b3c6','0','18.118.148.178','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714108951','thread.php?threadid=249&page=1&sid=7ed12630cae05e7b3d7235a617ee24d9','0','0','')
mysql error: Duplicate entry '6bb08759bfb98e8beb94e3a92cf6b3c6' for key 'PRIMARY'
mysql error number: 1062
mysql version: 10.1.48-MariaDB-0+deb9u2
php version: 5.2.6
Date: 26.04.2024 @ 07:22
Script: /thread.php?threadid=249&page=1&sid=7ed12630cae05e7b3d7235a617ee24d9
Referer: