title: Kentico 10 export site ambiguous columns
body: <p>I am trying to export a site in Kentico 10.  During the export Pages section, a page template I created fails with the following error message.</p>
  
  <pre><code>Message: Ambiguous column name 'City'.
  Ambiguous column name 'State'.
  Ambiguous column name 'PostalCode'.
  </code></pre>
  
  <p>These are pretty common fields.  Do I need to do something special to my page type?</p>