Second Self-To-Self relationship in Entity Framework

Question

Assume we have a domain class

public class Incident
{
    [Key]
    public virtual int IncidentId { get; set; }

    [Display(Name = "Parent Incident")]
    public virtual Incident ParentIncident { get; set; }

    [Display(Name = "Related Claim")]
    public virtual Incident ClaimIncident { get; set; }

 }

Other properties are omitted for simplicity.

When I had just ParentIncident in place, everything worked fine. Now I have added ClaimIncident to the class. I am attempting to update my database using the Entity Framework 4.3 (PreRelease) Migrations option, but I am getting an error, that EF doesn't know how to map Incident to Incident.

Why referencing the same class instance once is allowed per class, and when I introduce the second one, it suddenly has no clue of how to reference it? And how can I correct the model class?