title: Appengine Error 400 while deploying bloog
body: <p>Recently i was deploying <a href="https://github.com/DocSavage/bloog" rel="nofollow">bloog</a> a python based webblog on appengine but got this error </p>
  
  <pre><code>Uploading index definitions.
  Error 400: --- begin server output ---
  Creating a composite index failed: This index:
  entity_type: "Article"
  ancestor: false
  Property {
    name: "published"
    direction: 2
  }
  </code></pre>
  
  <p>the content of index.yaml is </p>
  
  <pre><code>indexes:
  
  - kind: Article
    properties:
    - name: __searchable_text_index
    - name: published
      direction: desc
  
  - kind: Article
    properties:
    - name: article_type
    - name: published
      direction: desc
  
  - kind: Article
    properties:
    - name: article_type
    - name: title
  
  - kind: Article
    properties:
    - name: display_type
    - name: published
      direction: desc
  
  - kind: Article
    properties:
    - name: published
      direction: desc
  
  - kind: Article
    properties:
    - name: tags
    - name: published
      direction: desc
  
  - kind: Comment
    properties:
    - name: article
    - name: thread
  
  # AUTOGENERATED
  </code></pre>
  
  <p>so it fails to update index.yaml file, thus it gives 500 error on the main site , How do i fix it?</p>