I see that this is what's going on.
mihai.petcu wrote:When selecting major upgrade after changing the version in a package with multiple instances, each instance will not have its product code changed.
This means each instance will have a minor upgrade applied in the new version:
But is it enough to apply a "minor upgrade" to the instances of a product which just got a major upgrade? What happens if this upgrade contains changes which are not possible in a minor upgrade?
Thank you very much!