title: Google play error when trying to update beta
body: <p>I'm receiving this error when trying to upload a new apk to my beta channel:</p>
  
  <blockquote>
    <p><strong>Errors</strong></p>
    
    <p>Resolve these errors before starting the rollout of this release.</p>
    
    <p><em>You can't rollout this release because it doesn't allow any existing users to upgrade to the newly added APKs.</em></p>
  </blockquote>
  
  <p>In my alpha channel, witch is updated far more frequently, I can successfully upload the same apk.</p>
  
  <p>How can I solve it?</p>