def remove_keys(apps, schema_editor):
    """
    We can't import the Post model directly as it may be a newer
    version than this migration expects. We use the historical version.
    """
    QA = apps.get_model('questionanswers', 'QA')
    for obj in QA.objects.all():
        obj.user_obj = obj.user_obj_2
        obj.save()
