Commerce sample build fails with many "package downgrade" warning-as-errors

[iSeabiscuit]

I'm new to Uno Platform and have been away from Visual Studio for a while working on other projects. So I apologize if this issue is superfluous (pilot error).

I've upgraded VS to 17.8.3. I've installed the latest .NET 8. I've run uno-check also. Trying to ensure I have everything at the latest revision and unmodified from the current sample code. But the Commerce sample build fails with many package downgrade errors. I'll give a single example here, below, but there are a large number of them (looks like about 157 of them).

Error NU1605 Warning As Error: Detected package downgrade: Uno.Toolkit.WinUI from 5.0.19 to 5.0.15. Reference the package directly from the project to select a different version. Commerce.Windows -> Commerce -> Uno.Toolkit.WinUI (>= 5.0.19) Commerce.Windows -> Uno.Toolkit.WinUI (>= 5.0.15) Commerce.Windows D:\Data\Dev_Demos\Uno.Samples\reference\Commerce\Commerce\Commerce.Windows\Commerce.Windows.csproj

Again I apologize if there's a step I missed when updating everything, and I'm eager to move ahead with studying samples instead of hitting build errors in this and other samples.