The Amazon Alexa integration can only be activated for one WiZ home at once, otherwise Alexa would not know which home to control. Thus, when you activate the Alexa 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 Alexa integration in the WiZ application for your “old” home.