django-hvad migration: How to modify old migrations?

[sowinski]

Hi,

I replaced django-hvad with django-parler (which works fine now) but I don't know how to "modify" my migration files.

I have for example this migration file:

Generated by Django 2.0 on 2018-10-30 08:15

from django.db import migrations
import django.db.models.deletion
import hvad.fields


class Migration(migrations.Migration):

    dependencies = [
        ('mycity', '0011_mydistricttranslation_slug'),
    ]

    operations = [
        migrations.AddField(
            model_name='mycity',
            name='_hvad_query',
            field=hvad.fields.SingleTranslationObject('mycity.MyCity', 'mycity.MyCityTranslation'),
        ),
        migrations.AddField(
            model_name='mydistrict',
            name='_hvad_query',
            field=hvad.fields.SingleTranslationObject('mycity.MyDistrict', 'mycity.MyDistrictTranslation'),
        ),
        migrations.AlterField(
            model_name='mycitytranslation',
            name='master',
            field=hvad.fields.MasterKey(editable=False, on_delete=django.db.models.deletion.CASCADE, related_name='translations', to='mycity.MyCity'),
        ),
        migrations.AlterField(
            model_name='mydistricttranslation',
            name='master',
            field=hvad.fields.MasterKey(editable=False, on_delete=django.db.models.deletion.CASCADE, related_name='translations', to='mycity.MyDistrict'),
        ),
    ]

If I delete the hvad package I can not run the server, because it raise an exception that it can not import hvad.

I guess I have to modify somehow this migration file. But I don't know how.