WiX5 / Heatwave - WIX0091 - Duplicate Property ALLUSERS

I'm trying to create a new Wix Package for an MSI setup with the Heatwave extension for Visual Studio 2019.

In Visual Studio I create a new MSI Package project using Heatwave. Immediately after Heatwave generated the new project, I already see a list of 101 warnings: The global element 'http://wixtoolset.org/schemas/v4/wxs:101DifferentElements' has already been declared.

If I then add <Property Id="ALLUSERS" Value="2" /> and try to compile, I get: Error WIX0091 Duplicate Property with identifier 'ALLUSERS' found.

I even removed the <Feature> element to rule out any interference with the included ExampleComponents.wxs. - No difference.

If I run wix build .\Package.wxs on the command line I get the very same WIX0091 error.

The complete XML of my .wxs file is this:

<Wix xmlns="http://wixtoolset.org/schemas/v4/wxs">
  <Package Name="Wix5_Heatwave_Package1" Manufacturer="TODO Manufacturer" 
           Version="1.0.0.0" UpgradeCode="7208ccb9-5e6f-4f68-839c-673ab4e201e6">
    <MajorUpgrade DowngradeErrorMessage="!(loc.DowngradeError)" />

    <Property Id="ALLUSERS" Value="2" />

  </Package>
</Wix>

Versions used: Wix V5.0.2, Heatwave V1.0.4

I'm all new to WiX5, but do have some experience with WiX3.*. What am I doing wrong here?

Solution

Don't specify ALLUSERS directly. Use the Package element's Scope attribute instead. In your case, I think you'll want Scope='perUserOrMachine'.