EfCore OwnsOne种可空物体失败

我想种子数据与EfCore到我拥有的实体中谁可以 nullable

实体：

public class RootEntity
{
    protected RootEntity() { }

    public Guid Id { get; set; }

    public OwnedEntityLevel1? OwnedEntityLevel1 { get; set; } // can be nullable
}

public class OwnedEntityLevel1
{
    public Guid Id { get; set; }
}

模型配置，用于代码的第:

protected override void OnModelCreating(ModelBuilder modelBuilder)
{
    modelBuilder.Entity<RootEntity>(b =>
    {
        b.OwnsOne(x => x.OwnedEntityLevel1, ob =>
        {
            ob.HasData(RootEntity.All.Select(x => new
                { x.OwnedEntityLevel1?.Id, RootEntityId = x.Id }));
        });
        b.HasData(RootEntity.All.Select(x => new { x.Id }));
    });
}

当我试图创造我的迁移：

dotnet ef migrations add Initial --context NullableObjectDbContext -o Migrations/NullableObject

我收到错误：

这种实体对实体的类型'OwnedEntityLevel1'不能加入，因为没有任何价值提供了所需的财产'Id'。

消息oviously是正确的。 但我不明白如果你能子可空物体与 .HasData 不知怎的?

数据，我想种子：

public static RootEntity PredefinedEntity11 { get; } =
    new(
        Guid.Parse("96e1d442-bdd0-4c6f-9d01-624b27abbac3"),
        new OwnedEntityLevel1
        {
            Id = Guid.Parse("8f8eea73-0b43-412a-b0aa-a9338db6e067")
        }
    );

public static RootEntity PredefinedEntity12 { get; } =
    new(
        Guid.Parse("aae51dac-016e-472e-ad51-2f09f8cb9fbb"),
        null! // When i add this the migration fails with The seed entity for entity type 'OwnedEntityLevel1' cannot be added because no value was provided for the required property 'Id'
    );

public static IReadOnlyList<RootEntity> All { get; } =
    new List<RootEntity>(new[] { PredefinedEntity11, PredefinedEntity12 }).AsReadOnly();

我我正常的程序流程，我可以添加可空物体而不是一个问题：

var ctx = new NullableObjectDbContext();
var rootEntity = new RootEntity(Guid.NewGuid(), null);
ctx.Add(rootEntity);
ctx.SaveChanges();

我已经创建了一个最小的可重复的例子来说明： https://github.com/enterprisebug/EfCoreHasDataNestedOwnedTypes/tree/main/EfCoreHasDataNestedOwnedTypes/NullableObject