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 ('399cc18144ca5d1de23519f026a241e1','0','3.137.187.233','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714743483','forgotpw.php?sid=0818c9e8b499bdf1b02de681f5af02de','0','0','')
mysql error: Duplicate entry '399cc18144ca5d1de23519f026a241e1' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.42-log
php version: 5.6.40
Date: 03.05.2024 @ 15:38
Script: /forgotpw.php?sid=0818c9e8b499bdf1b02de681f5af02de
Referer: