SQL-DATABASE ERROR

Database error in WoltLab Burning Board (2.3.6 pl2): Invalid SQL: INSERT INTO bb1_sessions (sessionhash,userid,ipaddress,useragent,lastactivity,request_uri,styleid,langid,authentificationcode) VALUES ('d4bcda551f37e31e262527d1b57c8814','0','18.221.154.151','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714422083','addreply.php?postid=399','0','0','')
mysql error: Duplicate entry 'd4bcda551f37e31e262527d1b57c8814' for key 'PRIMARY'
mysql error number: 1062
mysql version: 8.0.11
php version: 5.6.10
Date: 29.04.2024 @ 22:21
Script: /addreply.php?postid=399
Referer: