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 ('f5f63d8108a9bb904873ca889c818eef','0','52.15.134.57','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1716087363','formmail.php?threadid=4923&sid=6dfd82cfb95e6ce18ab1ba1922b1a2b8','0','0','')
mysql error: Duplicate entry 'f5f63d8108a9bb904873ca889c818eef' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.42-log
php version: 5.6.40
Date: 19.05.2024 @ 04:56
Script: /formmail.php?threadid=4923&sid=6dfd82cfb95e6ce18ab1ba1922b1a2b8
Referer: