Android parse browser alert device registered multiple times

Question

I am using syntax conversation notification to send push notifications to users of my application. I added the code suggested in Registering Android Parse Push device only once on one device

on each unistall, and then a new installation forces my device to register again, simply updating the application (without deleting it first), the object is updated using the code suggested in the link above. How can I update the same user if he installs the application after unistalling or at least removes his data from my parsing data.