Got it solved. I missed to delete the egg_info files of all previous Django versions. Removed them from /usr/local/lib/python2.7/dist-packages
. Also from /usr/lib/python2.7/dist-packages
(if any present here)
sudo pip freeze| grep Django
sudo pip show -f Django
sudo pip search Django | more +/^Django
All above commands should not show Django version to verify clean uninstallation
.