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 ('6d5d62d05e4f58b701e07b0ef526659a','0','18.116.73.165','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715766295','thread.php?postid=137220&sid=5fa3adfb136d4b71e2e69e789b48e7b7','0','0','')
mysql error: Duplicate entry '6d5d62d05e4f58b701e07b0ef526659a' for key 'PRIMARY'
mysql error number: 1062
mysql version: 10.6.16-MariaDB-0ubuntu0.22.04.1
php version: 5.6.40
Date: 15.05.2024 @ 11:44
Script: /thread.php?postid=137220&sid=5fa3adfb136d4b71e2e69e789b48e7b7
Referer: