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 ('a7f8fa6e5d1f940f8e923ebc5f96e314','0','3.145.201.47','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715565426','thread.php?goto=lastpost&threadid=23590&sid=1cbcc3c14626efa8edc389f84b2d7756','0','0','')
mysql error: Duplicate entry 'a7f8fa6e5d1f940f8e923ebc5f96e314' for key 'PRIMARY'
mysql error number: 1062
mysql version: 10.6.15-MariaDB-cll-lve-log
php version: 5.6.40
Date: 13.05.2024 @ 01:57
Script: /thread.php?goto=lastpost&threadid=23590&sid=1cbcc3c14626efa8edc389f84b2d7756
Referer: http://www.biker-community.com/thread.php?goto=lastpost&threadid=23590&sid=1cbcc3c14626efa8edc389f84b2d7756