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 ('f31cfe8c02c8e2002f5635e8aafd6d35','0','13.59.100.42','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714268008','board.php?boardid=131&page=1&daysprune=1000&sortfield=lastposttime&sortorder=ASC&sid=f43f7b77104e373d50feff6a496f6143','0','0','')
mysql error: Duplicate entry 'f31cfe8c02c8e2002f5635e8aafd6d35' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 28.04.2024 @ 03:33
Script: /board.php?boardid=131&page=1&daysprune=1000&sortfield=lastposttime&sortorder=ASC&sid=f43f7b77104e373d50feff6a496f6143
Referer: