Upgrading MX-Firewalls bound to Template

[Weny]

Hi everybody,
I need help with my Meraki Network. Lets say I have 40 Network / Sites in my Dashboard and each and everyone of them has a single MX67. All of those Sites are built by using templates and therefor all the Sites in general and all the MX Firewalls are bound to a single template.
Now I want to upgrade those sites. Is there any chance I can upgrade those Sites on a different day or just separately generally speaking.
If yes I would be very pleased if you could help me out here with the solution. If that is not possible I would love to know how you guys would deploy such a infrastructure with templates. 

Thanks in advance,
Toni

[alemabrahao]

No, the only way is if you had part of the MXes in a different template.