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 ('728c7635072b849f8be7d7aaf97f8173','0','3.135.230.164','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715541353','login.php?sid=138d3a60aaa38f8bf458518421902fcb','0','0','')
mysql error: Duplicate entry '728c7635072b849f8be7d7aaf97f8173' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 12.05.2024 @ 21:15
Script: /login.php?sid=138d3a60aaa38f8bf458518421902fcb
Referer: http://wehrbauten.de/login.php?sid=138d3a60aaa38f8bf458518421902fcb