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 ('c8521a4973dccd80bc1af5986a49c7e2','0','3.145.89.60','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715831148','board.php?boardid=79&sid=8601121e912fe9360032c2d05be5eaad','0','0','')
mysql error: Duplicate entry 'c8521a4973dccd80bc1af5986a49c7e2' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 16.05.2024 @ 05:45
Script: /board.php?boardid=79&sid=8601121e912fe9360032c2d05be5eaad
Referer: http://wehrbauten.de/board.php?boardid=79&sid=8601121e912fe9360032c2d05be5eaad