After adding in the latest Windows 10 Admin Templates into the central store, I was getting an error when opening objects:
Namespace ‘Microsoft.Policies.WindowsStore’ is already defined as the target namespace for another file in the store.
File \\domain.local\SysVol\domain.local\Policies\PolicyDefinitions\WinStoreUI.admx, line 4, column 80 when We had he same issue after importing the WIN10 group policy ADMX/ADML files to Central Store.
The fix I found was very simple:
“Rename the files to the original filenames (the new WindowsStore.admx/WindowsStore.adml to WinStoreUI.admx/WinStoreUI.adml) fixed the problem.”