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 ('81b48a48863379cc061bb15b4bfc1763','0','18.217.182.45','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714727407','thread.php?threadid=665&goto=lastpost&sid=e40cd8497998d91fd4e3165ace5804b6','0','0','')
mysql error: Duplicate entry '81b48a48863379cc061bb15b4bfc1763' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 03.05.2024 @ 11:10
Script: /thread.php?threadid=665&goto=lastpost&sid=e40cd8497998d91fd4e3165ace5804b6
Referer: