What steps will reproduce the problem?

[Index("Name",Unique = true)]
public abstract class AbsClass : Entity
{
    [Field,Key]
    public Guid Id { get; private set; }

    [Field]
    public string Name { get; set; }
}

[HierarchyRoot]
public class MyClass : AbsClass
{
}

What is the expected output? Table MyClass with Unique index on Name field

What do you see instead? Table MyClass without Unique index on Name field

What version of the product are you using? On what operating system? 4.4.0, Win7