How to change material type

Hi all,
I’ve watched couple of videos regarding Omniverse materials, but I cannot find how to swap one material with another.

For example I have assigned OmniPBR to the faces of a glass windows, exported it to Omniverse but now I would like to swap that OmniPBR to OmniGlass material.


Okay, I think I managed to change the type from OmniPBR to OmniGlass but I am getting an error when trying to change the glass roughness.

The glass color and ior does change without issues for example.