Error Regenerating R.java File After Refactoring (moving) A Project Folder In Intellij Idea

My current Android project structure in IntelliJ is free.nrw.commons, but I need to change it to fr.free.nrw.commons. I created the 'fr' folder and used the refactor tool to move '

Solution 1:

I found the reason for the problem. When doing the Refactor>Move, I needed to select the 'move entire directory' option, not the 'move package' option.