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 ('64b5a4e25dce779e795ea67dfb4014aa','0','3.129.67.26','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714190150','thread.php?threadid=1339953&sid=5e5136692a2157b1b3be622d6140e059','0','0','')
mysql error: Duplicate entry '64b5a4e25dce779e795ea67dfb4014aa' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.5.55-0+deb7u1-log
php version: 5.4.45-0+deb7u14
Date: 27.04.2024 @ 05:55
Script: /thread.php?threadid=1339953&sid=5e5136692a2157b1b3be622d6140e059
Referer: