Publishing KoBoToolbox apk to playtore

Hi everyone
I am new to kobotoolBox, I was required to add some changes to kobotoolBox project. I have successfully run the project in android studio and have applied changes now need to publish that.

I want to ask that I have cloned this project from GitHub means it has the same package name with which already an APK is published on play-store. What should I do to publish APK that I have created. Should I change the package name or there is another alternate except changing package name??