Is there a way to override unique_together constraint on proxy models in Django?

Is there a way to override unique_together constraint on proxy models in
Django?

References

Reference NO 1

http://stackoverflow.com/questions/15185656/is-there-a-way-to-override-unique-together-constraint-on-proxy-models-in-django

Reference NO 2

http://stackoverflow.com/questions/3993560/django-how-to-override-unique-together-error-message

Reference NO 3

https://docs.djangoproject.com/en/1.5/ref/models/options/

Reference NO 4

http://django-social-auth.readthedocs.org/en/latest/configuration.html

Reference NO 5

https://github.com/omab/django-social-auth/blob/master/doc/configuration.rst

Reference NO 6

http://django-irc-logs.com/2013/feb/05/

Reference NO 7

http://www.slideshare.net/ubernostrum/django-in-depth

Reference NO 8

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