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 ('84f620d144ff6a0b26b8eb2d4c9fedcc','0','18.188.146.77','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1716088379','thread.php?threadid=1056&goto=lastpost&sid=5adafe8ff9f02835d4fa89bbb8cf6f95','0','0','')
mysql error: Duplicate entry '84f620d144ff6a0b26b8eb2d4c9fedcc' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 19.05.2024 @ 05:12
Script: /thread.php?threadid=1056&goto=lastpost&sid=5adafe8ff9f02835d4fa89bbb8cf6f95
Referer: