How can we avoid renaming 'last_login' field of own user model when migrating from Django 1.4 to 1.5?

How can we avoid renaming 'last_login' field of own user model when
migrating from Django 1.4 to 1.5?

References

Reference NO 1

http://stackoverflow.com/questions/15200273/how-can-we-avoid-renaming-last-login-field-of-own-user-model-when-migrating-fr

Reference NO 2

http://stackoverflow.com/questions/16866282/django-1-5-python-3-3-and-most-suitable-nix-distro-for-it

Reference NO 3

http://scottbarnham.com/blog/2008/08/21/extending-the-django-user-model-with-inheritance/

Reference NO 4

http://planetdjango.org/

Reference NO 5

https://github.com/omab/django-social-auth

Reference NO 6

http://django-irc-logs.com/2013/apr/21/

Reference NO 7

https://code.djangoproject.com/query?component=Database+layer+(models%2C+ORM)&page=6&order=type&row=description

Reference NO 8

#EANF#