old_contents: # -*- coding: utf-8 -*-
  from __future__ import unicode_literals
  
  from django.db import migrations, models
  
  
  class Migration(migrations.Migration):
  
      dependencies = [
          ('course_modes', '0004_auto_20151113_1457'),
      ]
  
      operations = [
          migrations.RemoveField(
              model_name='coursemode',
              name='expiration_datetime',
          ),
          migrations.AddField(
              model_name='coursemode',
              name='_expiration_datetime',
              field=models.DateTimeField(db_column=b'expiration_datetime', default=None, blank=True, help_text='OPTIONAL: After this date/time, users will no longer be able to enroll in this mode. Leave this blank if users can enroll in this mode until enrollment closes for the course.', null=True, verbose_name='Upgrade Deadline'),
          ),
      ]
  
new_contents: # -*- coding: utf-8 -*-
  from __future__ import unicode_literals
  
  from django.db import migrations, models
  
  
  class Migration(migrations.Migration):
  
      dependencies = [
          ('course_modes', '0004_auto_20151113_1457'),
      ]
  
      operations = [
          migrations.SeparateDatabaseAndState(
              database_operations=[],
              state_operations=[
                      migrations.RemoveField(
                          model_name='coursemode',
                          name='expiration_datetime',
                      ),
                      migrations.AddField(
                          model_name='coursemode',
                          name='_expiration_datetime',
                          field=models.DateTimeField(db_column=b'expiration_datetime', default=None, blank=True, help_text='OPTIONAL: After this date/time, users will no longer be able to enroll in this mode. Leave this blank if users can enroll in this mode until enrollment closes for the course.', null=True, verbose_name='Upgrade Deadline'),
                      ),
              ]
          )
      ]
  
subject: Change broken course_modes migration to not touch the database.