Resizing Private Storage Max Size Template

Trying to resize the Private Storage Max Size using the GUI but its greyed out. Is there a way to do this with qvm?

Based on my experience system storage resize option can be unavailable, but never seen that happening with private storage. Have you run out of disk space by any chance?
Anyway, I think you are looking for this.

I have a qube that for some reason won’t boot after increasing the private storage max size using
the gui. Then tried to resize to smaller disk using lvresize and still will not boot