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 ('27787b1209b66f126373f06d841cc2b1','0','3.135.207.129','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715363055','formmail.php?userid=1&sid=5ddefa5d13d3827335ae263d7e8b728f','0','0','')
mysql error: Duplicate entry '27787b1209b66f126373f06d841cc2b1' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 10.05.2024 @ 19:44
Script: /formmail.php?userid=1&sid=5ddefa5d13d3827335ae263d7e8b728f
Referer: