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 ('c96749cd8915f21fd6caffd5caf36a9c','0','18.223.170.21','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715902926','board.php?boardid=354&page=1&daysprune=1000&sortfield=views&sortorder=ASC&sid=8bab9fdfb162efe439a5bfbdf7937219','0','0','')
mysql error: Duplicate entry 'c96749cd8915f21fd6caffd5caf36a9c' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 17.05.2024 @ 01:42
Script: /board.php?boardid=354&page=1&daysprune=1000&sortfield=views&sortorder=ASC&sid=8bab9fdfb162efe439a5bfbdf7937219
Referer: http://wehrbauten.de/board.php?boardid=354&page=1&daysprune=1000&sortfield=views&sortorder=ASC&sid=8bab9fdfb162efe439a5bfbdf7937219