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 ('28ec65437671744752dc7a786096f51d','0','3.140.249.104','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715953213','misc.php?action=imprint&sid=e40bfd7146567c4551fc6624784c337e','0','0','')
mysql error: Duplicate entry '28ec65437671744752dc7a786096f51d' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 17.05.2024 @ 15:40
Script: /misc.php?action=imprint&sid=e40bfd7146567c4551fc6624784c337e
Referer: http://wehrbauten.de/misc.php?action=imprint&sid=e40bfd7146567c4551fc6624784c337e