Follow these steps to clean up Strong Auth server instances:
1. Connect to Strong Auth database.
2. Run below query to remove SA instance:
delete from arwfinstances where INSTANCENAME='<Host_Name>';
3. Run below query to remove the protocol entries associated with that instance:
delete from ARWFPROTOCOLCONFIGURATION where ((PROTOCOLID=1 OR PROTOCOLID=2 OR PROTOCOLID=3 OR PROTOCOLID=4 OR PROTOCOLID=5 OR PROTOCOLID=6 OR PROTOCOLID=7) AND HOSTNAME='<Host_Name>');
3. Restart application server and Strong Auth services after committing these transactions.