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 ('f91db59e3108013ee1b7e7aa74413c26','0','127.0.0.1','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714230238','board.php?boardid=4&sid=4810358458d6767c15854b36059508b6','0','0','')
mysql error: Duplicate entry 'f91db59e3108013ee1b7e7aa74413c26' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.42-0ubuntu0.18.04.1
php version: 7.2.34-36+ubuntu18.04.1+deb.sury.org+1
Date: 27.04.2024 @ 17:03
Script: /forum/board.php?boardid=4&sid=4810358458d6767c15854b36059508b6
Referer: http://www.ichat.de/forum/board.php?boardid=4&sid=4810358458d6767c15854b36059508b6