title: Retaining app package ID when updating from Windows 8.1 to Windows 10 store app
body: <p>I have an App that is currently published to the Windows Store, as a Windows 8.1 App. (Published in 2013)</p>
  
  <p>I have since created a new UWP app for the Windows 10 store that will replace it. It has a different identity, so it does not load the same save data.</p>
  
  <p>What and how do I make my UWP 10 app use the Windows 8 identity?</p>
  
  <p>(The new app is completely compatible with older save data and provides a superior experience)</p>