title: TF400023 Error in TFS after cancel reconcilation
body: <p>I ran a Build on my TFS...</p>
  
  <p>I deleted a Folder in our Workspace and then checked this change in. 
  The Build ran successfully and then the Reconcile Message Popped up and I accidently clicked "Cancel".</p>
  
  <p>Now TFS cannot reconcile my workspace with the server.</p>
  
  <p>I tried to reconcile with the latest Build by Builds -> Latest Build -> Reconcile with Workspace. It said that there were no pending changes to reconcile.</p>
  
  <p>I even ran the studio as an Admin.</p>
  
  <p>How can I fix this???</p>