title: Android Realm Migration version number based on what?
body: <p>I'm doing my first Realm migration and started thinking about the version number. On what is this version number based? </p>
  
  <p>Because if it is based on what is on your phone, how do I handle it if a new person installs the app and gets a migration? Because it will also update the fields which where already set because of a fresh install.</p>