Disable one master

Hi,
I have 3 masters. Light Bold and Black. I’d like to disable Bold. To see if I really need it.

Is there some kind of trick to do this? I don’t want to delete Bold master just disable for a while. Or if I could copy a bold master as a new font?

You can change the weight value of the Bod master so something bigger than the Black.

It does the trick. Thank You.