App crashing on updating it from app store
<p>I have app version 1 submitted on app store.Now I have uploaded the app version 2 on app store and it is live also.</p>

<p>The problem I am facing when I update my app from version 1 to 2 app crashes.whereas when I delete my version 1 app and install version 2 app from app store it works fine.</p>

<p>The problem i can figure it out so far is that we have made changes in database structure in version 2 app(adding few columns into it).</p>

<p>The thing basically i want to ask is that when we update an app from app store does it remove the database of previous version and replace with new version or the previous version of database remains in app till the time we don't delete the app and install new version into device.</p>

<p>If it is true that the the previous version of database remains in an app while updating, then what could be the possible solutions to resolve.</p>

<p>Kindly help me with that.</p>
