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 ('5cb087f52f5b532a7917cbfa88798ecc','0','18.191.84.32','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714902427','board.php?boardid=264&page=1&daysprune=1000&sortfield=lastposttime&sortorder=ASC&sid=78bc5b3709aea35ce348e3c23560b35c','0','0','')
mysql error: Duplicate entry '5cb087f52f5b532a7917cbfa88798ecc' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 05.05.2024 @ 11:47
Script: /board.php?boardid=264&page=1&daysprune=1000&sortfield=lastposttime&sortorder=ASC&sid=78bc5b3709aea35ce348e3c23560b35c
Referer: http://wehrbauten.de/board.php?boardid=264&page=1&daysprune=1000&sortfield=lastposttime&sortorder=ASC&sid=78bc5b3709aea35ce348e3c23560b35c