bzr: ERROR: Already a branch:

Hi,

How to fix the "bzr: ERROR: Already a branch: " error?

I was doing "bzr branch lp:~ubuntu-elisp/emacs/snapshot-packaging emacs-snapshot", and it works fine the first time.
Then I push the changes to my own bzr repo.

Now I want to work from the "lp:~ubuntu-elisp/emacs/snapshot-packaging" repo all over again, so I did,

 mv emacs-recipe emacs-recipe_2013-06-21

Then call "bzr branch lp:~ubuntu-elisp/emacs/snapshot-packaging emacs-snapshot" the same time that I did before. However, this time I get:

 bzr: ERROR: Already a branch: "emacs-snapshot".

How can I fix it?

Thanks