Complex case not taking for some reason

Samples.sln

@@ -7,6 +7,11 @@ Project("{6EC3EE1D-3C4E-46DD-8F32-0CC8E7565705}") = "Sample26", "Samples\Sample2
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "sample9", "Samples\Sample9\sample9.csproj", "{ED109455-CE6C-4BB1-B540-B5DEF8795BD3}"
 EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{FA5AAF11-9B9A-4852-9E31-98FFB1E82881}"
+	ProjectSection(SolutionItems) = preProject
+		Directory.Packages.props = Directory.Packages.props
+	EndProjectSection
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU

Samples/Directory.Build.props

@@ -1,13 +1,15 @@
 <Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
 
-  <Import Project="$(MSBuildThisFileDirectory)\..\OutputBuildProps.props" />
+  <Import Project="$(MSBuildThisFileDirectory)..\OutputBuildProps.props" />
+  <!-- Import Project="$(MSBuildThisFileDirectory)..\Directory.Packages.props" / -->
 
   <PropertyGroup>
     <DocumentationFile />
     <DisableImplicitFSharpCoreReference>true</DisableImplicitFSharpCoreReference>
     <DisableImplicitSystemValueTupleReference>true</DisableImplicitSystemValueTupleReference>
     <!-- .nuget\packages\dotnet.reproduciblebuilds.isolated\x.x.x\Sdk\Sdk.targets -->
     <EnsureNETFrameworkReferenceAssembliesProvided>false</EnsureNETFrameworkReferenceAssembliesProvided>
+    <ManagePackageVersionsCentrally>true</ManagePackageVersionsCentrally>
   </PropertyGroup>
 
 </Project>

Samples/Sample26/Sample26.fsproj

@@ -14,15 +14,15 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="AltCover.Api" Version="8.3.839" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.3.2" />
-    <PackageReference Include="NUnit" Version="3.13.3" />
-    <PackageReference Include="NUnit3TestAdapter" Version="4.2.1">
+    <PackageReference Include="AltCover.Api" VersionOverride="8.4.840" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" />
+    <PackageReference Include="NUnit" />
+    <PackageReference Include="NUnit3TestAdapter">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="Unquote" Version="6.1.0" />
-    <PackageReference Include="FSharp.Core" Version="6.0.6">
+    <PackageReference Include="Unquote" />
+    <PackageReference Include="FSharp.Core">
       <ExcludeAssets>contentfiles</ExcludeAssets>
     </PackageReference>
   </ItemGroup>

Samples/Sample9/sample9.csproj

@@ -7,22 +7,14 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="altcover" Version="8.3.839" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.3.2" />
-    <PackageReference Include="xunit" Version="2.4.2" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.5">
+    <PackageReference Include="altcover" VersionOverride="8.4.840" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" />
+    <PackageReference Include="xunit" />
+    <PackageReference Include="xunit.runner.visualstudio">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
     <DotNetCliToolReference Include="dotnet-xunit" Version="2.3.1" />
   </ItemGroup>
 
-  <ItemGroup>
-    <PackageReference Include="Microsoft.NETFramework.ReferenceAssemblies" Version="1.0.3">
-      <PrivateAssets>all</PrivateAssets>
-      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
-    </PackageReference>
-  </ItemGroup>
-
-
 </Project>