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 ('81797ee5e2fd6a1b0af09514ca9b68dc','0','18.188.241.82','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714087850','board.php?boardid=630&page=1&daysprune=1000&sortfield=replycount&sortorder=ASC&sid=62f90998631f773171c2e837186eb4e1','0','0','')
mysql error: Duplicate entry '81797ee5e2fd6a1b0af09514ca9b68dc' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 26.04.2024 @ 01:30
Script: /board.php?boardid=630&page=1&daysprune=1000&sortfield=replycount&sortorder=ASC&sid=62f90998631f773171c2e837186eb4e1
Referer: http://wehrbauten.de/board.php?boardid=630&page=1&daysprune=1000&sortfield=replycount&sortorder=ASC&sid=62f90998631f773171c2e837186eb4e1