c# - オブジェクトが null 値になる Automapper マッピングの後

Question

 public class CreateOrEditOwnerDetailInput : IInputDto
    {
        [Required]
        public OwnerDetailEditDto OwnerDetail { get; set; }
    }

    [AutoMap(typeof(OwnerDetail))]
    public class OwnerDetailEditDto
    {
        public const int MaxLength = 50;
        public const int NotesMaxLength = 300;

        public int? Id { get; set; }

        [Required]
        [MaxLength(MaxLength)]
        public string LastName { get; set; }


        [Required]
        [MaxLength(MaxLength)]
        public string CompanyName { get; set; }

        [Required]
        public OwnerContactDetailDto ContactDetail { get; set; }

        [Required]
        public AdditionalAddressDto AdditionalAddress { get; set; }

    }



 [Table("IpOwnerDetails")]
    public class OwnerDetail : FullAuditedEntity
    {
        public const int MaxLength = 50;
        public const int NotesMaxLength = 300;

        [Required]
        [MaxLength(MaxLength)]
        public virtual string LastName { get; set; }

        [Required]
        [MaxLength(MaxLength)]
        public virtual string CompanyName { get; set; }


        [ForeignKey("AdditionalAddressId")]
        public virtual AdditionalAddress AdditionalAddress { get; set; }
        public virtual int AdditionalAddressId { get; set; }

        [ForeignKey("ContactDetailId")]
        public virtual ContactDetail ContactDetail { get; set; }
        public virtual int ContactDetailId { get; set; }


    }

public class OwnerContactDetailDto : FullAuditedEntityDto
    {
        public const int NumberMaxLength = 20;

        [Required]
        [MaxLength(NumberMaxLength)]
        public string MainPhoneNumber { get; set; }

        [MaxLength(NumberMaxLength)]
        public string HomePhoneNumber { get; set; }

        [Required]
        public ContactDetailType Type { get; set; }
    }

  public class AdditionalAddressDto : FullAuditedEntityDto, IOutputDto
    {
        public const int MaxLength = 50;

        [Required]
        [MaxLength(MaxLength)]
        public string StreetNumber { get; set; }

        [Required]
        public AddressType Type { get; set; }

        [Required]
        public int CityId { get; set; }

        [Required]
        public int StateId { get; set; }


    }

Mapper.CreateMap<AdditionalAddress, AdditionalAddressDto>()
              .ReverseMap()
              .ForMember(additionalAddress => additionalAddress.Id, options => options.Ignore());

            Mapper.CreateMap<ContactDetail, OwnerContactDetailDto>()
              .ReverseMap()
              .ForMember(contactDetail => contactDetail.Id, options => options.Ignore());


 public async Task<int?> EditOwnerDetailAsync(CreateOrEditOwnerDetailInput input)
        {
            var ownerDetail = await _ownerDetailRepository.FirstOrDefaultAsync(p => p.Id == input.OwnerDetail.Id);
            input.OwnerDetail.MapTo(ownerDetail);//after this it goes null
            await _ownerDetailRepository.UpdateAsync(ownerDetail);
            return input.OwnerDetail.Id;

        }

画像URL： http: //imgur.com/a/GRdw6

Q:メソッド内でと のEditOwnerDetailAsync両方がにマッピングされた後、その理由を教えてください。詳しくは画像をご覧ください。AdditionalAddressContactDetailnull

例外 ：

    ERROR 2015-11-20 17:56:18,666 [26   ] lers.Filters.AbpExceptionFilterAttribute - System.Data.Entity.Infrastructure.DbUpdateException: An error occurred while 
updating the entries. See the inner exception for details. ---> 
System.Data.Entity.Core.UpdateException: An error occurred while updating the 
entries. See the inner exception for details. ---> 
System.Data.SqlClient.SqlException: The UPDATE statement conflicted with the 
FOREIGN KEY constraint 
"FK_dbo.IpOwnerDetails_dbo.IpAdditionalAddresses_AdditionalAddressId". The 
conflict occurred in database "IP", table "dbo.IpAdditionalAddresses", column 'Id'.
    The statement has been terminated.

注:ここで奇妙なことは、デバッグ ポインターをinput.OwnerDetail.MapTo(ownerDetail);行に戻すと (2 回目)、オブジェクトAdditionalAddressとオブジェクトのデータが埋めContactDetailられることです。