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 ('81d784592e96079c85503859dbd1806c','0','3.15.221.67','claudebot','1713480854','thread.php?threadid=1122&page=1&sid=77b038e8f60fa567de5c59204c3e2af1','0','0','')
mysql error: Duplicate entry '81d784592e96079c85503859dbd1806c' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 19.04.2024 @ 00:54
Script: /thread.php?threadid=1122&page=1&sid=77b038e8f60fa567de5c59204c3e2af1
Referer: http://wehrbauten.de/thread.php?threadid=1122&page=1&sid=77b038e8f60fa567de5c59204c3e2af1