python - How to add new columns to django userprofile model -

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i have added 1 custom field phone django user authentication. till worked properly. later added 1 more custom field called permissions. after facing error message when try access admin page. here model.py code

from django.contrib.auth.models import user django.db import models class userprofile(models.model):     # line required. links userprofile user model instance.     user = models.onetoonefield(user)     class meta:         permissions = (                        ("ssc_1","can access ssc locked questions"),                        )     # additional attributes wish include.     phone = models.charfield(max_length =20)     permission = models.integerfield()         # override __unicode__() method return out meaningful!     def __unicode__(self):         return self.user.username

i have followed this stackoverflow answer, when issue python manage.py migrate command, getting error message

return database.cursor.execute(self, query, params) django.db.utils.operationalerror: table "users_userprofile" exists

note : django versions 1.6.6

thanks

migrations introduced in django 1.7. until south being used handle migrations


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