content: from django.db import migrations
  
  
  def update_content_types(apps, schema_editor):
      ContentType = apps.get_model('contenttypes', 'ContentType')
  
      # Delete the new ContentTypes effected by the new models in the vpn app
      ContentType.objects.filter(app_label='vpn', model='l2vpn').delete()
      ContentType.objects.filter(app_label='vpn', model='l2vpntermination').delete()
  
      # Update the app labels of the original ContentTypes for ipam.L2VPN and ipam.L2VPNTermination to ensure
      # that any foreign key references are preserved
      ContentType.objects.filter(app_label='ipam', model='l2vpn').update(app_label='vpn')
      ContentType.objects.filter(app_label='ipam', model='l2vpntermination').update(app_label='vpn')
  
  
  class Migration(migrations.Migration):
      dependencies = [
          ('ipam', '0054_squashed_0067'),
      ]
  
      operations = [
          migrations.RemoveConstraint(
              model_name='l2vpntermination',
              name='ipam_l2vpntermination_assigned_object',
          ),
          migrations.SeparateDatabaseAndState(
              state_operations=[
                  migrations.RemoveField(
                      model_name='l2vpntermination',
                      name='assigned_object_type',
                  ),
                  migrations.RemoveField(
                      model_name='l2vpntermination',
                      name='l2vpn',
                  ),
                  migrations.RemoveField(
                      model_name='l2vpntermination',
                      name='tags',
                  ),
                  migrations.DeleteModel(
                      name='L2VPN',
                  ),
                  migrations.DeleteModel(
                      name='L2VPNTermination',
                  ),
              ],
              database_operations=[
                  migrations.AlterModelTable(
                      name='L2VPN',
                      table='vpn_l2vpn',
                  ),
                  migrations.AlterModelTable(
                      name='L2VPNTermination',
                      table='vpn_l2vpntermination',
                  ),
              ],
          ),
          migrations.RunPython(code=update_content_types, reverse_code=migrations.RunPython.noop),
      ]
  