Removing discovered server from SQL Computers Group

Hello,

I am trying to get 2 specific servers to not populate under the "SQL Computers" group. Specifically in the Microsoft SQL Server > Computers view in the SQL MP

I have created a group containing the 2 computers and set it as the target for the override on discovery "Discover SQL Server Computer Group membership"

I then run the Remove-SCOMDisabledClassInstance cmdlet but the computers remain in this view.

I attempted the same steps to disable the SQL DB Engine discovery for these 2 servers and it worked fine

Any ideas?