How to block creation redundant FK Constraint in EF TPH Code First - entity-framework

Question

I use in some project EF code First with TPH (in part of classes)
I have class like this:
namespace Billing.Model.Domain.Entities.BilProject
{
[Table("ProjectPriceList")]
public abstract class ProjectPriceList
{
[Key, Column("ProjectId", Order = 0)]
public int ProjectId { get; set; }
[Key, Column("PriceListId", Order = 1)]
public int PriceListId { get; set; }
[Key, Column("PriceListSourceType", Order = 2)]
public int PriceListSourceType { get; set; }
[ForeignKey("PriceListSourceType")]
public virtual BillingProjectCode PriceListSourceTypeCode { get; set; }
public int AddUsrnm { get; set; }
public DateTime AddTmstmp { get; set; }
[ForeignKey("ProjectId")]
public virtual BillingProject BillingProject { get; set; }
public virtual SnapShotPriceList SnapShotPriceList{ get; set; }
}
public class BillingProjectPriceList : ProjectPriceList
{
[ForeignKey("PriceListId")]
public virtual PriceList PriceList { get; set; }
}
public class EstimateProjectPriceList : ProjectPriceList
{
}
}
When I try to generate sql code to create a data base by
Update-Database -Script from console
I receive this SQL as result:
CREATE TABLE [dbo].[ProjectPriceList] (
[ProjectId] [int] NOT NULL,
[PriceListId] [int] NOT NULL,
[PriceListSourceType] [int] NOT NULL,
[AddUsrnm] [int] NOT NULL,
[AddTmstmp] [datetime] NOT NULL,
[Discriminator] [nvarchar](128) NOT NULL,
CONSTRAINT [PK_dbo.ProjectPriceList] PRIMARY KEY ([ProjectId], [PriceListId], [PriceListSourceType])
)
CREATE INDEX [IX_ProjectId] ON [dbo].[ProjectPriceList]([ProjectId])
CREATE INDEX [IX_PriceListId] ON [dbo].[ProjectPriceList]([PriceListId])
CREATE INDEX [IX_PriceListSourceType] ON [dbo].[ProjectPriceList]([PriceListSourceType])
ALTER TABLE [dbo].[ProjectPriceList] ADD CONSTRAINT [FK_dbo.ProjectPriceList_dbo.BillingProject_ProjectId] FOREIGN KEY ([ProjectId]) REFERENCES [dbo].[BillingProject] ([ProjectId]) ON DELETE CASCADE
ALTER TABLE [dbo].[ProjectPriceList] ADD CONSTRAINT [FK_dbo.ProjectPriceList_dbo.BillingProjectCode_PriceListSourceType] FOREIGN KEY ([PriceListSourceType]) REFERENCES [dbo].[BillingProjectCode] ([CodeId]) ON DELETE CASCADE
ALTER TABLE [dbo].[ProjectPriceList] ADD CONSTRAINT [FK_dbo.ProjectPriceList_dbo.PriceList_PriceListId] FOREIGN KEY ([PriceListId]) REFERENCES [dbo].[PriceList] ([PriceListId]) ON DELETE CASCADE
The last FK Constraint is redudant and make me trouble if i try add new EstimateProjectPriceList.
My question is
How to stop create this FK by some code Data Annotations or Fluent Api in OnModelCreating ?
Thnx for any help..