Redeploying an app



I built a yelpcamp app and deployed it. I then went back to my original files, copied and renamed them so that the same application would be used to represent another website with different material. The first was about campsites and the second is about travel photos. I put the copy in a new directory and then deployed it on heroku, like the first. The second app overwrote the first app, despite having different names. I am now going back to the first app and want to redeploy it but am afraid it will just replace the other app again. How can I get both onto Heroku?