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why test_UWP_1.0.0.2, already exists? even I have uninstalled
The ProvisionedAppxPackage
command you used will install the app for every user account of your OS. When you just uninstall it from the current user, the 1.0.0.2 version is still installed in other user accounts.
It's means that cant downgrade via "dism /online /Add-ProvisionedAppxPackage" ?
Yes, that is the answer.
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