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 ('70765b3666689da2edd399f600ca134f','0','18.223.119.17','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714870824','board.php?boardid=397&page=1&daysprune=1000&sortfield=replycount&sortorder=ASC&sid=32829cb320c6a43884b14c84b96c4993','0','0','')
mysql error: Duplicate entry '70765b3666689da2edd399f600ca134f' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 05.05.2024 @ 03:00
Script: /board.php?boardid=397&page=1&daysprune=1000&sortfield=replycount&sortorder=ASC&sid=32829cb320c6a43884b14c84b96c4993
Referer: http://wehrbauten.de/board.php?boardid=397&page=1&daysprune=1000&sortfield=replycount&sortorder=ASC&sid=32829cb320c6a43884b14c84b96c4993