new_contents: # -*- coding: utf-8 -*-
  """Migration for the deletion of an orphan chain link in the workflow."""
  
  from __future__ import unicode_literals
  
  from django.db import migrations
  
  
  def delete_orphan_mscl(apps, schema_editor):
      """Delete orphan chain link "Index transfer contents".
  
      It was left behind in migration `0020`.
      """
      MicroServiceChainLink = apps.get_model('main', 'MicroServiceChainLink')
  
      index_transfer_contents_mscl_id = 'eb52299b-9ae6-4a1f-831e-c7eee0de829f'
  
      MicroServiceChainLink.objects.filter(
          id=index_transfer_contents_mscl_id).delete()
  
  
  class Migration(migrations.Migration):
  
      dependencies = [
          ('main', '0059_siparrange_longblob'),
      ]
  
      operations = [
          migrations.RunPython(delete_orphan_mscl, migrations.RunPython.noop),
      ]
  
subject: delete orphan chain link