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 ('c7bb23c0d28b9310453452a737774b22','0','18.188.147.91','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715585408','board.php?boardid=535&sid=791dcec06aaa513ba0ee2f2175540e38','0','0','')
mysql error: Duplicate entry 'c7bb23c0d28b9310453452a737774b22' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 13.05.2024 @ 09:30
Script: /board.php?boardid=535&sid=791dcec06aaa513ba0ee2f2175540e38
Referer: http://wehrbauten.de/board.php?boardid=535&sid=791dcec06aaa513ba0ee2f2175540e38