Ef核心数据种子

大家好,我对数据播种有意见。当我尝试为这个实体播种时:

modelBuilder.Entity<Place>().HasData(new Place
        {
            Id = Guid.NewGuid().ToString(),
            Name = "Europe",
            PlaceIsContainedIn = new Place
            {
                Id = Guid.NewGuid().ToString(),
                IdPlaceIsContainedIn = Guid.NewGuid().ToString(),
                Name = "Bulgaria",
                LevelNo = 0,
            }
        });

出现以下错误:

无法添加实体类型“Place”的种子实体,因为它设置了导航“PlaceIsContainerIn”。若要为关系设定种子,请将实体种子添加到“Place”并指定外键值{“IdPlaceIsContainerIn”}。

我有这个Place类:

public class Place
{
    public string Id { get; set; } = Guid.NewGuid().ToString();

    [ForeignKey(nameof(PlaceIsContainedIn))]
    public string? IdPlaceIsContainedIn { get; set; }

    public Place PlaceIsContainedIn { get; set; }

    public string Name { get; set; }

    public int LevelNo { get; set; }

    public ICollection<Contact> ContinentContacts { get; set; } = new HashSet<Contact>();

    public ICollection<Contact> CountryContacts { get; set; } = new HashSet<Contact>();

    public ICollection<Contact> CityContacts { get; set; } = new HashSet<Contact>();
}

这是我的背景:

modelBuilder.Entity<Place>().Property(x => x.Name).HasColumnType("nvarchar(50)");
        modelBuilder.Entity<Place>().Property(x => x.LevelNo).HasColumnType("tinyint");
        modelBuilder.Entity<Place>().HasOne(x => x.PlaceIsContainedIn).WithMany().OnDelete(DeleteBehavior.Restrict);
        modelBuilder.Entity<Place>().Property(x => x.IdPlaceIsContainedIn).IsRequired(false);

请,如果有人知道如何解决这个问题,如果你能和我分享,我会很高兴。