old_contents: # -*- coding: utf-8 -*-
  # Generated by Django 1.10.6 on 2017-03-17 18:27
  from __future__ import unicode_literals
  
  import django.contrib.auth.validators
  from django.db import migrations, models
  
  
  class Migration(migrations.Migration):
  
      dependencies = [
          ('users', '0013_profile_event_reminder_time'),
      ]
  
      operations = [
          migrations.AlterField(
              model_name='user',
              name='username',
              field=models.CharField(error_messages={'unique': 'A user with that username already exists.'}, help_text='Required. 150 characters or fewer. Letters, digits and @/./+/-/_ only.', max_length=150, unique=True, validators=[django.contrib.auth.validators.ASCIIUsernameValidator()], verbose_name='username'),
          ),
      ]
  
new_contents: # -*- coding: utf-8 -*-
  # Generated by Django 1.10.6 on 2017-03-17 18:27
  from __future__ import unicode_literals
  
  from django.db import migrations, models
  try:
      import django.contrib.auth.validators
      extra_kwargs = {'validators': [django.contrib.auth.validators.ASCIIUsernameValidator()]}
  except ImportError:
      extra_kwargs = {}
  
  
  class Migration(migrations.Migration):
  
      dependencies = [
          ('users', '0013_profile_event_reminder_time'),
      ]
  
      operations = [
          migrations.AlterField(
              model_name='user',
              name='username',
              field=models.CharField(error_messages={'unique': 'A user with that username already exists.'},
                                     help_text='Required. 150 characters or fewer. Letters, digits and @/./+/-/_ only.',
                                     max_length=150, unique=True, verbose_name='username', **extra_kwargs),
          ),
      ]
  
subject: Fix backward compatibility of migrations