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 ('3f26827b84bf0eced48f2a34dc60a3a6','0','18.227.183.215','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1744984435','formmail.php?threadid=746','0','0','')
mysql error: Duplicate entry '3f26827b84bf0eced48f2a34dc60a3a6' for key 'PRIMARY'
mysql error number: 1062
mysql version: 8.0.11
php version: 5.6.10
Date: 18.04.2025 @ 15:53
Script: /formmail.php?threadid=746
Referer: http://gttempel.de/formmail.php?threadid=746