Create a proxy repository to https://www.powershellgallery.com/api/v2/
Create a nuget group repository "nuget-group" and add the proxy repository into it.
Observe that version 2.0.0 is in the metadata.
Now delete the PowerShell-2.0.0.nupkg repository from the proxy, and download the group level metadata again:
Notice that version 2.0.0 is no longer present in the metadata. This will make subequent download attempts of that version through the group using NuGet client fail.
Expiring the group level cache fixes this problem.
Expected: Removing a nuget package from a proxy repository should not remove its version from the metadata