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 ('3b4f150daede8af38344ded2c0abe81a','0','3.139.83.7','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715704276','board.php?boardid=763&sid=6b1daadc78cd11f4a097045185d25501','0','0','')
mysql error: Duplicate entry '3b4f150daede8af38344ded2c0abe81a' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 14.05.2024 @ 18:31
Script: /board.php?boardid=763&sid=6b1daadc78cd11f4a097045185d25501
Referer: http://wehrbauten.de/board.php?boardid=763&sid=6b1daadc78cd11f4a097045185d25501