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 ('f86d645f2f4d1a0dd32b76a240843653','0','18.223.170.21','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1716189124','thread.php?goto=lastpost&threadid=7564&sid=4e07b6312d0505311ea4e0aa3f335803','0','0','')
mysql error: Duplicate entry 'f86d645f2f4d1a0dd32b76a240843653' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.42-log
php version: 5.6.40
Date: 20.05.2024 @ 09:12
Script: /thread.php?goto=lastpost&threadid=7564&sid=4e07b6312d0505311ea4e0aa3f335803
Referer: