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 ('efb5cfe32bd2f7b70ad1ec825d56f5bc','0','52.14.60.56','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1737780148','ct_mail.php?Page=497611618','0','0','')
mysql error: Duplicate entry 'efb5cfe32bd2f7b70ad1ec825d56f5bc' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.33-0ubuntu0.16.04.1
php version: 5.6.40
Date: 25.01.2025 @ 05:42
Script: /ct_mail.php?Page=497611618
Referer: