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 ('4b441586340b0efb8ca736f5968839e7','0','3.144.127.232','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714933717','board.php?boardid=81&page=1&daysprune=1000&sortfield=replycount&sortorder=ASC&sid=4eacba077fccf7e6819c3bf5e582cf61','0','0','')
mysql error: Duplicate entry '4b441586340b0efb8ca736f5968839e7' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 05.05.2024 @ 20:28
Script: /board.php?boardid=81&page=1&daysprune=1000&sortfield=replycount&sortorder=ASC&sid=4eacba077fccf7e6819c3bf5e582cf61
Referer: http://wehrbauten.de/board.php?boardid=81&page=1&daysprune=1000&sortfield=replycount&sortorder=ASC&sid=4eacba077fccf7e6819c3bf5e582cf61