new_contents: # Generated by Django 2.2.10 on 2020-02-06 16:27
  
  from django.db import migrations, models
  
  
  class Migration(migrations.Migration):
  
      dependencies = [
          ("addressbase", "0010_remove_onsud_ctry_flag"),
      ]
  
      operations = [
          migrations.AddField(
              model_name="address",
              name="addressbase_postal",
              field=models.CharField(default="D", max_length=1),
              preserve_default=False,
          ),
      ]
  
subject: migrate derived model