Ignore same file in different folders with .gitignore

Question

How do I use .gitignore to ignore a file that can be in more than one folder, having the same name?

I have

-folderA -folderAA -file.json -folderB -folderBB -file.json

What I need is an expression to ignore both file.json in folderA/folderAA and folderB/folderBB without having to use two expressions for each file.

EDIT START
The file is already tracked by git
EDIT END

Answer 1

You can use the ** wildcard to specify any directory

for example: **/file.json