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 ('b91f5c455941e293d0e9ab667cd0f28f','0','3.144.159.187','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1716084371','memberslist.php?sid=d484b91d4ba747ed70d2d2636c90bbb0','0','0','')
mysql error: Duplicate entry 'b91f5c455941e293d0e9ab667cd0f28f' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 19.05.2024 @ 04:06
Script: /memberslist.php?sid=d484b91d4ba747ed70d2d2636c90bbb0
Referer: http://wehrbauten.de/memberslist.php?sid=d484b91d4ba747ed70d2d2636c90bbb0