If you are upgrading your installation of Django from a previous version, you will need to uninstall the old Django version before installing the new version.
If you installed Django using pip or easy_install previously, installing with pip or easy_install again will automatically take care of the old version, so you don't need to do it yourself.
If you previously installed Django manually, uninstalling is as simple as deleting the django directory from your Python site-packages. To find the directory you need to remove, you can run the following at your shell prompt (not the interactive Python prompt):
python -c "import sys; sys.path = sys.path[1:]; import django; print(django.__path__)"