Android thinks new game is an update of old game

So I prototyped a game for android, lets say game1. I wanted to make another game that shared some mechanics with the first one, lets say game2. So I copied it and started working on that.

Now installing game2 on my android it asks if I want to replace the old version -_-

Edit:

But I don't want it replaced. Because they are two separate games. -_-

Pre thanks