找不到实体类型的属性的后备字段，并且该属性没有吸气剂

我有一个例外

System.InvalidOperationException : No backing field could be found for property 'ApartmentId' of entity type 'Address' and the property does not have a getter.

这是我的Apartment课：

public class Apartment
{
    public Apartment(Address address)
    {
        Address = address;
    }

    private Apartment()
    {
    }

    public int Id { get; private set; }
    public Address Address { get; private set; }
}

这是我的Address值对象类：

public class Address : IEquatable<Address>
{
    private Address()
    {
    }

    public Address(string streetNumber, string streetName, string city, string state, string zipCode)
    {
        StreetNumber = streetNumber;
        StreetName = streetName;
        City = city;
        State = state;
        ZipCode = zipCode;
    }

    public string StreetNumber { get; private set; }
    public string StreetName { get; private set; }
    public string City { get; private set; }
    public string State { get; private set; }
    public string ZipCode { get; private set; }

    public bool Equals(Address other)
    {
        if (ReferenceEquals(null, other))
        {
            return false;
        }

        if (ReferenceEquals(this, other))
        {
            return true;
        }

        return String.Equals(StreetNumber, other.StreetNumber, StringComparison.OrdinalIgnoreCase) &&
               String.Equals(StreetName, other.StreetName, StringComparison.OrdinalIgnoreCase) &&
               String.Equals(City, other.City, StringComparison.OrdinalIgnoreCase) &&
               String.Equals(State, other.State, StringComparison.OrdinalIgnoreCase) &&
               String.Equals(ZipCode, other.ZipCode, StringComparison.OrdinalIgnoreCase);
    }
}

在我的实体配置中，我使用builder.OwnsOne(a => a.Address);。在我的存储库中，我进行了以下调用：

    public async Task<Apartment> GetByAddressAsync(Address address)
    {
        return await _context.Apartments.FirstOrDefaultAsync(a => a.Address.Equals(address));
    }

并产生上面的异常。有任何想法吗？我不知道为什么它说我的Address值对象中有一个“ ApartmentId” 。