      slug3 = models.SlugField(blank=True, allow_unicode=True)
  
  
  class RelatedPrepopulated(models.Model):
      parent = models.ForeignKey(MainPrepopulated)
      name = models.CharField(max_length=75)
      pubdate = models.DateField()
      status = models.CharField(
          max_length=20,
          choices=(('option one', 'Option One'),
 
</s> remove     contact = models.ForeignKey(Author, related_name='book_contact_set')
    publisher = models.ForeignKey(Publisher)
 </s> add     contact = models.ForeignKey(Author, models.CASCADE, related_name='book_contact_set')
    publisher = models.ForeignKey(Publisher, models.CASCADE) </s> remove     contact = models.ForeignKey(Author, related_name='book_contact_set')
    publisher = models.ForeignKey(Publisher)
 </s> add     contact = models.ForeignKey(Author, models.CASCADE, related_name='book_contact_set')
    publisher = models.ForeignKey(Publisher, models.CASCADE) </s> remove     contact = models.ForeignKey(Author, related_name='book_contact_set')
    publisher = models.ForeignKey(Publisher)
 </s> add     contact = models.ForeignKey(Author, models.CASCADE, related_name='book_contact_set')
    publisher = models.ForeignKey(Publisher, models.CASCADE) </s> remove     parent = models.ForeignKey(UUIDPKParent)
 </s> add     parent = models.ForeignKey(UUIDPKParent, models.CASCADE) </s> remove     parent = models.ForeignKey(UUIDPKParent)
 </s> add     parent = models.ForeignKey(UUIDPKParent, models.CASCADE)
    parent = models.ForeignKey(MainPrepopulated, models.CASCADE)
      slug3 = models.SlugField(blank=True, allow_unicode=True)
  
  
  class RelatedPrepopulated(models.Model):
    parent = models.ForeignKey(MainPrepopulated, models.CASCADE)
      name = models.CharField(max_length=75)
      pubdate = models.DateField()
      status = models.CharField(
          max_length=20,
          choices=(('option one', 'Option One'),
keep keep keep keep replace keep keep keep keep keep
 Fixed #21127 -- Started deprecation toward requiring on_delete for ForeignKey/OneToOneField 
tests/admin_views/models.py