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 ('b876a14f7ae58bcb830cdf3f8150e7cb','0','18.188.142.146','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715065933','board.php?boardid=539&sid=480e129c012702c756a0c365eb7b51ea','0','0','')
mysql error: Duplicate entry 'b876a14f7ae58bcb830cdf3f8150e7cb' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 07.05.2024 @ 09:12
Script: /board.php?boardid=539&sid=480e129c012702c756a0c365eb7b51ea
Referer: http://wehrbauten.de/board.php?boardid=539&sid=480e129c012702c756a0c365eb7b51ea