title: gcloud preview app deploy throws
body: <p>I am not sure what I am doing wrong? I can run the app locally in cloud9. gcloud info doesn't show me anything out of the ordinary... any help</p>
  
  <pre><code>xxxxx:~/workspace (master) $ gcloud preview app deploy --version v1
  You are about to deploy the following modules:
   - valued-vault-xxxxx/default (from [/home/ubuntu/workspace/app.yaml])
       Deployed URL: [https://valued-vault-xxxxx.appspot.com]
  
  Do you want to continue (Y/n)?  Y
  
  Beginning deployment...
  Copying files to Google Cloud Storage...
  Synchronizing files to [&lt;googlecloudsdk.api_lib.app.cloud_storage.BucketReference object at 0x7f506914f790&gt;].
  File upload done.
  Updating module [default]...failed.
  ERROR: (gcloud.preview.app.deploy) Error Response: [13] Errors were encountered while copying files to App Engine.
  
  Details: [
    [
      {
        "@type": "type.googleapis.com/google.rpc.ResourceInfo",
        "description": "Conflicting SHA1 sum for file. Expected \"d4fc6996_1e0f9444_1f1f82b3_f1v2eef4_9d5d12345\" but received \"f7f38209_fa22bdf0_9e73e6ec_7f60a936_9efc1f1e\".",
        "resourceName": "https://storage.googleapis.com/staging.valued-vault-xxxxx.appspot.com/f7f3d209fa25bcf09e73efec7f60a9369efc1f1e",
        "resourceType": "file"
      }
    ]
  ]
  </code></pre>