RelatedManager.set(..) no longer accepts a list of PKs

[Yu Li]

It seems that I can no longer pass a list of pks to RelatedManager.set(..).
Alternatively, passing a list of objects works as expected.

>>> p = Product.objects.all()[0]
>>> p
<Product: <Product pk=587 barcode=041390007019>>
>>> p.images.set([1])
Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/usr/local/lib/python3.8/dist-packages/django/db/models/fields/related_descriptors.py", line 750, in set
    self.add(*objs, bulk=bulk)
  File "/usr/local/lib/python3.8/dist-packages/django/db/models/fields/related_descriptors.py", line 656, in add
    check_and_update_obj(obj)
  File "/usr/local/lib/python3.8/dist-packages/django/db/models/fields/related_descriptors.py", line 648, in check_and_update_obj
    raise TypeError("'%s' instance expected, got %r" % (
TypeError: 'ProductImage' instance expected, got 1

class Product(m.Model):
    pass

class ProductImage(m.Model):
    product = m.ForeignKey(
        Product,
        on_delete=m.CASCADE,
        related_name='images',
    )