How to change package name

Hi there, I am currently experiencing some errors regarding putting my game up on google play, whenever I try to upload my apk file it tells me “You need to use a different package name because “com.Galaxy” already exists in Google Play.”. How do I overcome this any help is great!

Open project settings - Android, and change package name

Were you able to find a fix to this issue ? Whenever I change my package name in the UE4 project settings, it doesn’t package anymore.