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 ('a764b5360521402eea112c0f084736a9','0','3.144.97.189','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715316929','board.php?boardid=152&sid=557d33b9b40d03210fc75a56899d1d27','0','0','')
mysql error: Duplicate entry 'a764b5360521402eea112c0f084736a9' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 10.05.2024 @ 06:55
Script: /board.php?boardid=152&sid=557d33b9b40d03210fc75a56899d1d27
Referer: http://wehrbauten.de/board.php?boardid=152&sid=557d33b9b40d03210fc75a56899d1d27