Ticket #11682: admin-ui-11682.diff

django/src/django-admin-ui/django/forms/models.py

@@ -676 +676 @@
                 pk_value = form.instance.pk
             else:
                 try:
-                    if index:
+                    if index is not None:
                         pk_value = self.get_queryset()[index].pk
                     else:
                         pk_value = None