Upgrade Z-Wave firmware questions

[ArunGupta2014]

I have ISY on 5.0.4. When I select Upgrade Z-Wave Firmware, a warning box pops-up which says that I need to shift the primary to a different controller. What does this mean? Do I need to buy another device? What kind? If I shift primary to another device, upgrade firmware on ISY, then what? Do I need to move back primary to ISY?What would I lose in this movement? Is this movement of primary an ISY thing or is it with every Z-Wave controller?

[stusviews]

Yes, you need to change the primary controller or exclude all your devices. But, why are you attempting to upgrade. You should already have the latest version if you've been using Z-Wave devices.(which is 21110).

[ArunGupta2014]

I want to be prepared in the event that an upgrade does come out. What kind of device would I need to shift the primary?

[stusviews]

Any Z-Wave controller.

[ArunGupta2014]

Thanks, Do you happen to know if Aeon Labs Z-Stick would work?

[MWareman]

I used an Aeon minimote, but I believe a zstick *should* work.