title: In App Billing Error: Item already owned
body: <p>Hi when I'm buying the test item ("android.test.purchased") for the first time, google play popup window says that transaction was successful (like this): <img src="https://i.stack.imgur.com/Z1f1D.png" alt="enter image description here"></p>
  
  <p>First problem: After 'successful' transaction when I'm trying to buy same item it crash because it can't start another async operation <a href="https://www.dropbox.com/s/6i6pa46hhwtntqp/log.txt" rel="nofollow noreferrer">LOG</a></p>
  
  <p>Second problem: After changing fragment to another and then backing to donation fragment when I'm trying to buy another time test item it says that</p>
  
  <p><code>12-31 17:20:19.596: E/IabHelper(31546): In-app billing error: Unable to buy item, Error response: 7:Item Already Owned</code></p>
  
  <p>Problem is I want allow buying same item for multiple times.</p>
  
  <p>Whole class code: <a href="https://www.dropbox.com/s/2ly1ocadh6c9om1/class.txt" rel="nofollow noreferrer">https://www.dropbox.com/s/2ly1ocadh6c9om1/class.txt</a></p>