title: Change signing key, keep packagename
body: <p>I cant seem to find the answer to this: Is it possible to change signing-key but still use the same packagename? So that the people who bought my app can "re-download" the app with the new key, from the same Google Play page.</p>
  
  <p>The background to this is that I want to extend my signing key to more then 25 years I have set now. Maybe this is enough but I dont want to be put in a situation where the key expires.</p>
  
  <p>If this is not possible, could I remove my current Google Play app and create a new one with the same packagename and another key?</p>