Breeze.js proper method deleting entity in one to many relationship

Breeze.js proper method deleting entity in one to many relationship

Breeze 1.4.0, given the data model below, how to do I delete a child?
I am trying to use:
parent.children.remove(child);
but the update that is being sent to the server has a parentid of 0 and
entity state of "modified". The end result is an exception:
A foreign key value cannot be inserted because a corresponding primary key
value does not exist. [ Foreign key constraint name =
FK_dbo.Children_dbo.Parents_ParentId ]
What am I missing?
Data Model:
public class Parent
{
public Parent()
{
Children = new List<Child>();
}
[Key]
public int Id { get; set; }
public String OtherProperty { get; set; }
public IList<Child> Children { get; set; }
}
public class Child
{
[Key]
public int Id { get; set; }
public int ParentId { get; set; }
[ForeignKey("ParentId")]
public Parent Parent { get; set; }
}