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 ('970599fc2cb1c215bd5202ee6dfba842','0','3.141.31.209','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714239894','board.php?boardid=23&daysprune=1000&sortfield=lastposttime&sortorder=ASC&sid=27959bd6ad61d2cbf6055c0b082b3a73','0','0','')
mysql error: Duplicate entry '970599fc2cb1c215bd5202ee6dfba842' for key 'PRIMARY'
mysql error number: 1062
mysql version: 10.6.15-MariaDB-cll-lve-log
php version: 5.6.40
Date: 27.04.2024 @ 17:44
Script: /board.php?boardid=23&daysprune=1000&sortfield=lastposttime&sortorder=ASC&sid=27959bd6ad61d2cbf6055c0b082b3a73
Referer: http://www.biker-community.com/board.php?boardid=23&daysprune=1000&sortfield=lastposttime&sortorder=ASC&sid=27959bd6ad61d2cbf6055c0b082b3a73