Multiple path resolutions for same project

[Pankaj Jangid]

I keep my .emacs.d under Git. Recently I have started using the builtin
project system because it is much faster then the other packages
available. Moreover it perfectly integrates with the other systems
inside Emacs. For example, if I do project-find-file then it is added to
recent files and find-file (C-x C-f) history also has this
information. This make the builtin project system very convenient.

The problem which I am facing:

After using for few days, now I have two entries for my project - (1)
~/.emacs.d and (2) /Users/pankaj/.emacs.d (<- the macos user-home:-)).

This makes it annoying when I do project-find-file (C-x p f). There are
duplicate entries to select.

How can I make sure that the project system saves only one path
resolution in the ~/.emacs.d/projects file.

Regards
-- 
Pankaj Jangid