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 ('28ed91cc0c50812d53430b6b1fc96cc3','0','3.135.200.211','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715063882','thread.php?goto=lastpost&threadid=1646&sid=2f67869fac53cbf7510e840ea5c776e6','0','0','')
mysql error: Duplicate entry '28ed91cc0c50812d53430b6b1fc96cc3' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 07.05.2024 @ 08:38
Script: /thread.php?goto=lastpost&threadid=1646&sid=2f67869fac53cbf7510e840ea5c776e6
Referer: http://wehrbauten.de/thread.php?goto=lastpost&threadid=1646&sid=2f67869fac53cbf7510e840ea5c776e6