asp.net-mvc – 实体类型处于“阴影状态”是什么意思？

[DbContext(typeof(ApplicationDbContext))]
partial class ApplicationDbContextModelSnapshot : ModelSnapshot
{
    protected override void BuildModel(ModelBuilder modelBuilder)
    {
        modelBuilder
            .HasAnnotation("ProductVersion","7.0.0-rc1-16348")
            .HasAnnotation("SqlServer:ValueGenerationStrategy",SqlServerValueGenerationStrategy.IdentityColumn);

        modelBuilder.Entity("Salesboost.Models.ApplicationUser",b =>
        {
            b.Property<string>("Id");
            b.Property<int?>("TeamId");
            b.HasKey("Id");
            // -- <unrelated fields snipped> --
        });

        // -- <snipped> --

        modelBuilder.Entity("Team",b =>
        {
            b.Property<int>("Id").ValueGeneratedOnAdd();
            b.Property<string>("Name").IsRequired();
            b.Property<string>("ManagerId").IsRequired();
            b.HasKey("Id");
        });

        modelBuilder.Entity("Team",b =>
        {
            b.HasOne("ApplicationUser","Manager")
                .WithOne("TeamManaging")
                .HasForeignKey("ManagerId");
        });
    }
}

Team.cs：

public class Team
{
    public int Id { get; set; }
    public string Name { get; set; }
    public string ManagerId { get; set; }

    public virtual ApplicationUser Manager { get; set; }
    public virtual ICollection<ApplicationUser> Members { get; set; }
}

ApplicationUser：

public class ApplicationUser : Microsoft.AspNet.Identity.EntityFramework.IdentityUser
{
    public int? TeamId { get; set; }

    public virtual Team Team { get; set; }
    public virtual Team TeamManaging { get; set; }
}

当我尝试更新数据库时,dnx给出了以下错误：

The navigation property ‘Manager’ cannot be added to the entity type ‘Team’ because the entity type is defined in shadow state and navigations properties cannot be added to shadow state.

实体类型处于“阴影状态”意味着什么？有没有解决的办法？