Pipeline is running test cases twice after moving to new folder

Try to fix by below:

• Clean Build Output
  Add a step to delete the bin and obj folders before building:

- script: |
    echo Cleaning old build artifacts...
    rd /s /q "$(Build.SourcesDirectory)\YourProject\bin"
    rd /s /q "$(Build.SourcesDirectory)\YourProject\obj"
  displayName: 'Clean build folders'

• Enable Diagnostic Logging
  Set system.debug: true in your pipeline to get detailed logs and confirm which test assemblies are being picked up.
• Use Explicit Test Filters
  In your VSTest task, use testSelector or testAssembly filters to narrow down exactly which tests should run:

- task: VSTest@2
  inputs:
    testAssemblyVer2: '**\*Tests.dll'
    testFiltercriteria: 'FullyQualifiedName~YourNamespace'

• Delete Old Feature Files
  Make sure any old .feature.cs files generated by SpecFlow are removed from the project if the corresponding .feature files were moved or deleted.
• Check .csproj Includes
  Ensure your .csproj file doesn’t still include the old paths manually. Sometimes moved files are still referenced due to hardcoded paths.