Unhappy help how to rename package directory is root/data/data

here is what im saying... when i install the app you can find root/data/data

"com.folder.name.here"

i want to change it to

"com.my.project"


already edit the apk from manifest nothing happen.. it still creating the old package name folder hope someone can help me with this!

btw its not my app i just want redevelop it but just a newbie here
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