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 ('c26f579c8e4414930de9835cd4bd9985','0','3.137.171.121','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714933798','board.php?boardid=767&sid=7e6a9172954062f847a645b72a579875','0','0','')
mysql error: Duplicate entry 'c26f579c8e4414930de9835cd4bd9985' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 05.05.2024 @ 20:29
Script: /board.php?boardid=767&sid=7e6a9172954062f847a645b72a579875
Referer: http://wehrbauten.de/board.php?boardid=767&sid=7e6a9172954062f847a645b72a579875