new_contents: # -*- coding: utf-8 -*-
  from __future__ import unicode_literals
  
  from django.db import models, migrations
  import apps.core.models
  
  
  class Migration(migrations.Migration):
  
      dependencies = [
          ('core', '0017_group_affiliation'),
      ]
  
      operations = [
          migrations.AlterField(
              model_name='group',
              name='image',
              field=models.ImageField(null=True, upload_to=apps.core.models._generate_image_filename, blank=True),
              preserve_default=True,
          ),
      ]
  
subject: Add missing migrations for changed image field