继承的导航属性EF Core

Question

public abstract class Base {
    public Guid Id {get; set;}
    public Related1 Related1 {get; set;}
    public Related2 Related2 { get; set; }
}

public class Concrete1: Base { }
public class Concrete2: Base { }

public class Related1 {
    public Concrete1 Concrete1 {get; set;}
    public ICollection<Concrete2> Concrete2s {get; set;}
}

public class Related2 {
    public ICollection<Concrete1> Concrete1s {get; set;}
    public ICollection<Concrete2> Concrete2s {get; set;}
}

//OnModelCreating
builder.Entity<Base>()
       .HasDiscriminator<byte>("type")
       .HasValue<Concrete1>(0)
       .HasValue<Concrete2>(1);

builder.Entity<Concrete1>()
       .HasOne(du => du.Related1)
       .WithOne(d => d.Concrete1)
       .HasForeignKey<Concrete1>(du => du.Related1Id);

 builder.Entity<Concrete1>()
        .HasOne(du => du.Related2)
        .WithMany(u => u.Concrete1s)
        .HasForeignKey(eu => eu.Related2Id);

builder.Entity<Concrete2>()
       .HasOne(du => du.Related1)
       .WithMany(d => d.Concrete2s)
       .HasForeignKey(du => du.Related1Id);

builder.Entity<Concrete2>()
       .HasOne(du => du.Related2)
       .WithMany(u => u.Concrete2)
       .HasForeignKey(eu => eu.Related2Id);

//...
public DbSet<Base> Bases { get; set; }
public DbSet<Concrete1> Concrete1s { get; set; }
public DbSet<Concrete2> Concrete2s { get; set; }

我有错误：

  

导航属性＆＃39; Concrete1＆＃39;无法添加到实体类型   ＆＃39; Related1＆＃39;因为它的CLR类型＆＃39; Concrete1＆＃39;不符合   预期的CLR类型＆＃39; Base＆＃39;

如何解决？我已经调用了HasDiscriminator（）方法，为什么EF在Related1（2）中需要Base CLR类型为nav，而不是Concrete1（2）？