new_contents: # -*- coding: utf-8 -*-
  from __future__ import unicode_literals
  
  from django.db import models, migrations
  from django.conf import settings
  import datetime
  
  
  class Migration(migrations.Migration):
  
      dependencies = [
          ('account', '0001_initial'),
      ]
  
      operations = [
          migrations.AlterField(
              model_name='contract',
              name='user',
              field=models.ForeignKey(to=settings.AUTH_USER_MODEL),
              preserve_default=True,
          )
      ]
  
subject: fix bug contract user is unique