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 ('18a2abd81a5d93f390eaa79b541b831e','0','3.136.97.64','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1716192628','login.php?sid=d9abcd3dbaf870bb0af1154239022297','0','0','3cf8cb14fc5f61d481a668aff6f412b0')
mysql error: Duplicate entry '18a2abd81a5d93f390eaa79b541b831e' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.5.39-MariaDB-2
php version: 5.3.29-1+hw8
Date: 20.05.2024 @ 04:10
Script: /wbb77/login.php?sid=d9abcd3dbaf870bb0af1154239022297
Referer: