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 ('d443a53546b94a28ad3d15759fa8baff','0','18.217.144.32','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714026092','board.php?boardid=347&daysprune=1000&sortfield=lastposttime&sortorder=ASC&sid=0e41f7f84622ddb6450fc28f29ecaba1','0','0','')
mysql error: Duplicate entry 'd443a53546b94a28ad3d15759fa8baff' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 25.04.2024 @ 08:21
Script: /board.php?boardid=347&daysprune=1000&sortfield=lastposttime&sortorder=ASC&sid=0e41f7f84622ddb6450fc28f29ecaba1
Referer: http://wehrbauten.de/board.php?boardid=347&daysprune=1000&sortfield=lastposttime&sortorder=ASC&sid=0e41f7f84622ddb6450fc28f29ecaba1