The Google Home integration can only be activated for one WiZ home at once, otherwise Google Home would not know which home to control. Thus, when you activate the Google Assistant integration for a new home, it will alert you with a pop-up in the WiZ application that the preexisting integrations will be disabled.

The impact is equivalent to “de-activating” the toggle button next to your Google Home integration in the WiZ application for your “old” home.