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 ('7e1c4a6b8a7c6853790e7d41f26f08a5','0','3.15.25.32','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715075677','thread.php?goto=lastpost&threadid=1470&sid=1f1c928e7fb9944d4d8afce2f1b5ab2f','0','0','')
mysql error: Duplicate entry '7e1c4a6b8a7c6853790e7d41f26f08a5' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 07.05.2024 @ 11:54
Script: /thread.php?goto=lastpost&threadid=1470&sid=1f1c928e7fb9944d4d8afce2f1b5ab2f
Referer: http://wehrbauten.de/thread.php?goto=lastpost&threadid=1470&sid=1f1c928e7fb9944d4d8afce2f1b5ab2f