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 ('9969c8ce1fda59f1c9632aaf3b93b81b','0','3.144.154.208','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715023598','board.php?boardid=102&sid=a6e125ed16b9bd457489013830aaa627','0','0','')
mysql error: Duplicate entry '9969c8ce1fda59f1c9632aaf3b93b81b' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 06.05.2024 @ 21:26
Script: /board.php?boardid=102&sid=a6e125ed16b9bd457489013830aaa627
Referer: http://wehrbauten.de/board.php?boardid=102&sid=a6e125ed16b9bd457489013830aaa627