title: Cannot add part for the specified URI because it is already in the package
body: <p>I am using NUGET Pack in teamcity to build a package. But it is creating the following error. I am using nuget teamcity version 2.2.1.</p>
  
  <pre><code>Step 2/2: Build Package (NuGet Pack) (14s)
  
  [12:10:40][Step 2/2] Cleaning Z:\hgbuilds\IT\Build\packages
  
  [12:10:40][Step 2/2] pack: Create NuGet package from UI\UI.Tour\UI.Tour.Web\UI.Tour.Web.csproj (14s)
  
  [12:10:40][pack] NuGet command: C:\BuildAgent\tools\NuGet.CommandLine.2.2.1.nupkg\tools\NuGet.exe pack Z:\hgbuilds\IT\UI\UI.Tour\UI.Tour.Web\Calrom.UI.InclusiveTour.Web.csproj -OutputDirectory Z:\hgbuilds\IT\Build\packages -BasePath Z:\hgbuilds\IT -Verbose -Version 1.0.0.7 -Symbols -Properties Configuration=Deploy-Test
  
  [12:10:40][pack] Starting: C:\BuildAgent\temp\agentTmp\custom_script2086270793558421822.cmd
  
  [12:10:40][pack] in directory: Z:\hgbuilds\IT
  
  [12:10:45][pack] WARNING: Option 'Verbose' has been deprecated. Use 'Verbosity' instead.
  
  [12:10:45][pack] Attempting to build package from 'UI.Tour.Web.csproj'.
  
  [12:10:45][pack] Packing files from 'Z:\hgbuilds\IT\UI\UI.Tour\UI.Tour.Web\bin'.
  
  [12:10:46][pack] WARNING: Description was not specified. Using 'Description'.
  
  [12:10:48][pack] content
  
  [12:10:54][pack] Cannot add part for the specified URI because it is already in the package.
  
  [12:10:54][pack] Process exited with code 1
  
  [12:10:54][Step 2/2] Step Build Package (NuGet Pack) failed
  </code></pre>
  
  <p>Please guide what I am missing here.</p>