create(id=None) is valid, if id is AutoField

test-data/typecheck/models/test_create.yml

@@ -55,10 +55,11 @@
                 class Child4(Child1):
                     value4 = models.IntegerField()
 
--   case: optional_id_fields_for_create_is_error
+-   case: optional_id_fields_for_create_is_error_if_not_autofield
     main: |
         from myapp.models import Publisher, Book
-        Book.objects.create(id=None)  # E: Incompatible type for "id" of "Book" (got "None", expected "Union[Combinable, int, str]")
+
+        Book.objects.create(id=None)  # E: Incompatible type for "id" of "Book" (got "None", expected "Union[float, int, str, Combinable]")
         Book.objects.create(publisher=None)  # E: Incompatible type for "publisher" of "Book" (got "None", expected "Union[Publisher, Combinable]")
         Book.objects.create(publisher_id=None)  # E: Incompatible type for "publisher_id" of "Book" (got "None", expected "Union[Combinable, int, str]")
     installed_apps:
@@ -71,8 +72,23 @@
                 class Publisher(models.Model):
                     pass
                 class Book(models.Model):
+                    id = models.IntegerField(primary_key=True)
                     publisher = models.ForeignKey(Publisher, on_delete=models.CASCADE)
 
+-   case: none_for_primary_key_is_allowed_if_field_is_autogenerated
+    main: |
+        from myapp.models import Book
+        Book.objects.create(id=None)
+    installed_apps:
+        - myapp
+    files:
+        -   path: myapp/__init__.py
+        -   path: myapp/models.py
+            content: |
+                from django.db import models
+                class Book(models.Model):
+                    pass
+
 -   case: when_default_for_primary_key_is_specified_allow_none_to_be_set
     main: |
         from myapp.models import MyModel