### Release 1, migration 1

class Migration(migrations.Migration):

    dependencies = [
		....
    ]

    operations = [
        migrations.AlterField(null=True...),
    ]


### Release 1, migration 2

state_operations = [
    migrations.RemoveField(...)
]


class Migration(migrations.Migration):

    dependencies = [
        ('trading', '0001_initial'),
        ('data', '0003_auto_20190510_2010'),
    ]

    operations = [
        migrations.SeparateDatabaseAndState(
            state_operations=state_operations,
        )
    ]


### Release 2, migration 1


class Migration(migrations.Migration):

    dependencies = [
        ('trading', '0001_initial'),
        ('data', '0003_auto_20190510_2010'),
    ]

    operations = [
        migrations.RunSQL("DROP field from table")
        )
    ]