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 ('7d305d5ab254bcb4739b2bee9380fc84','0','3.12.36.30','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714166310','register.php?sid=5d4a52391710b08096135d03a6eaccdb','0','0','')
mysql error: Duplicate entry '7d305d5ab254bcb4739b2bee9380fc84' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 26.04.2024 @ 23:18
Script: /register.php?sid=5d4a52391710b08096135d03a6eaccdb
Referer: http://wehrbauten.de/register.php?sid=5d4a52391710b08096135d03a6eaccdb