علت و نحوه رفع خطا در فرم ایجاد  رکورد  که بلافاصله بعد از زدن کلید ایجاد در فرم ثبت  و قبل از ورود به خط اول تابع ثبت با این خطا متوقف میشه

متن خطا

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کد ویو
@model WebApplication2.Models.Dossier

@{
    ViewBag.Title = "Create";
}

<h2>Create</h2>

@using (Html.BeginForm())
{
    @Html.AntiForgeryToken()
    @Html.HiddenFor(model => model.ProfileInfoId)
    @Html.HiddenFor(model => model.Updated)
    @Html.HiddenFor(model => model.UpdateId)
    @Html.HiddenFor(model => model.dossier_num)
    @Html.HiddenFor(model => model.Inserted)
    @Html.HiddenFor(model => model.IsActive)
    @Html.HiddenFor(model => model.StartDate)
    @Html.HiddenFor(model => model.hire_end_date)
    @Html.HiddenFor(model => model.hire_start_date)
    @Html.HiddenFor(model => model.barcode)
    @Html.HiddenFor(model => model.AsnafCode)
    @Html.HiddenFor(model => model.degree)
    @Html.HiddenFor(model => model.mmodirdate)
    @Html.HiddenFor(model => model.modir_num)


    <div class="form-horizontal">
        <h4>Dossier</h4>
        <hr />
        @Html.ValidationSummary(true, "", new { @class = "text-danger" })




        <div class="form-group">
            @Html.LabelFor(model => model.realstate_title, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-2">
                @Html.EditorFor(model => model.realstate_title, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.realstate_title, "", new { @class = "text-danger" })
            </div>
        </div>





        <div class="form-group">
            @Html.LabelFor(model => model.work_address, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.work_address, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.work_address, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.provinceId, "provinceId", htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-2">
                @Html.DropDownList("provinceId", null, htmlAttributes: new { @class = "form-control" })
                @Html.ValidationMessageFor(model => model.provinceId, "", new { @class = "text-danger" })
            </div>
            @Html.LabelFor(model => model.CityId, "CityId", htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-2">
                @Html.DropDownList("CityId", null, htmlAttributes: new { @class = "form-control" })
                @Html.ValidationMessageFor(model => model.CityId, "", new { @class = "text-danger" })
            </div>
        </div>



        <div class="form-group">
            @Html.LabelFor(model => model.municipality_part, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-2">
                @Html.EditorFor(model => model.municipality_part, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.municipality_part, "", new { @class = "text-danger" })
            </div>

            @Html.LabelFor(model => model.Region, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-2">
                @Html.EditorFor(model => model.Region, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.Region, "", new { @class = "text-danger" })
            </div>
        </div>



        <div class="form-group">
            @Html.LabelFor(model => model.work_phone, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-2">
                @Html.EditorFor(model => model.work_phone, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.work_phone, "", new { @class = "text-danger" })
            </div>

            @Html.LabelFor(model => model.blue_Plaque, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-2">
                @Html.EditorFor(model => model.blue_Plaque, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.blue_Plaque, "", new { @class = "text-danger" })
            </div>
        </div>




        <div class="form-group">
            @Html.LabelFor(model => model.Register_Plaque, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-2">
                @Html.EditorFor(model => model.Register_Plaque, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.Register_Plaque, "", new { @class = "text-danger" })
            </div>
            @Html.LabelFor(model => model.Postal_code, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-2">
                @Html.EditorFor(model => model.Postal_code, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.Postal_code, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.Area, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-2">
                @Html.EditorFor(model => model.Area, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.Area, "", new { @class = "text-danger" })
            </div>

            @Html.LabelFor(model => model.groundArea, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-2">
                @Html.EditorFor(model => model.groundArea, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.groundArea, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.BalconyArea, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-2">
                @Html.EditorFor(model => model.BalconyArea, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.BalconyArea, "", new { @class = "text-danger" })
            </div>
            @Html.LabelFor(model => model.UndergroundArea, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-2">
                @Html.EditorFor(model => model.UndergroundArea, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.UndergroundArea, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.WCArea, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-2">
                @Html.EditorFor(model => model.WCArea, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.WCArea, "", new { @class = "text-danger" })
            </div>
            @Html.LabelFor(model => model.BossConfirmation, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-2">
                <div class="checkbox">
                    @Html.EditorFor(model => model.BossConfirmation)
                    @Html.ValidationMessageFor(model => model.BossConfirmation, "", new { @class = "text-danger" })
                </div>
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.OwnerShipStateId, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-2">
                @Html.DropDownList("OwnerShipStateId", null, htmlAttributes: new { @class = "form-control" })
                @Html.ValidationMessageFor(model => model.OwnerShipStateId, "", new { @class = "text-danger" })
            </div>

            @Html.LabelFor(model => model.LeaseKindId, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-2">
                @Html.DropDownList("LeaseKindId", null, htmlAttributes: new { @class = "form-control" })
                @Html.ValidationMessageFor(model => model.LeaseKindId, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.EndBuildingId, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-2">
                @Html.DropDownList("EndBuildingId", null, htmlAttributes: new { @class = "form-control" })
                @Html.ValidationMessageFor(model => model.EndBuildingId, "", new { @class = "text-danger" })
            </div>
            @Html.LabelFor(model => model.latitude, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-2">
                @Html.EditorFor(model => model.latitude, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.latitude, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.longitude, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-2">
                @Html.EditorFor(model => model.longitude, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.longitude, "", new { @class = "text-danger" })
            </div>
            @Html.LabelFor(model => model.tax_zone, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-2">
                @Html.EditorFor(model => model.tax_zone, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.tax_zone, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            <div class="col-md-offset-2 col-md-10">
                <input type="submit" value="Create" class="btn btn-default" />
            </div>
        </div>
    </div>
}

<div>
    @Html.ActionLink("Back to List", "Index")
</div>

کد تابع ثبت 
  // GET: Dossiers/Create
        public ActionResult Create()
        {
            ViewBag.provinceId = new SelectList(db.provinces, "provinceId", "provinceTitle");
            ViewBag.CityId = new SelectList(db.Citys, "CityId", "CityTitle");
            ViewBag.EndBuildingId = new SelectList(db.EndBuildings, "EndBuildingId", "EndBuildingTitle");
            ViewBag.LeaseKindId = new SelectList(db.LeaseKinds, "LeaseKindId", "LeaseKindTitle");
            ViewBag.OwnerShipStateId = new SelectList(db.OwnerShipStates, "OwnerShipStateId", "OwnerShipStateTitle");
            return View();
        }

        // POST: Dossiers/Create
        // To protect from overposting attacks, please enable the specific properties you want to bind to, for 
        // more details see https://go.microsoft.com/fwlink/?LinkId=317598.
        [HttpPost]
        [ValidateAntiForgeryToken]
        public ActionResult Create(Dossier dossier)
        {
            if (ModelState.IsValid)
            {
                dossier.AsnafCode = "0";
                dossier.barcode = "0";
                dossier.IsActive = false;
                dossier.mmodirdate = DateTime.Now;
                dossier.ProfileInfoId = 1000;
                dossier.Updated = DateTime.Now;
                dossier.UpdateId = 0;
                dossier.StartDate = DateTime.Now;
                dossier.dossier_num = "0";
                dossier.Inserted= DateTime.Now;
                dossier.hire_end_date = DateTime.Now;
                dossier.hire_start_date= DateTime.Now;
                dossier.degree = "نامشخص";
                dossier.modir_num = "0";
                db.Dossiers.Add(dossier);
                db.SaveChanges();
                return RedirectToAction("Index");
            }

            ViewBag.provinceId = new SelectList(db.provinces, "provinceId", "provinceTitle", dossier.provinceId);
            ViewBag.CityId = new SelectList(db.Citys, "CityId", "CityTitle", dossier.CityId);
            ViewBag.EndBuildingId = new SelectList(db.EndBuildings, "EndBuildingId", "EndBuildingTitle", dossier.EndBuildingId);
            ViewBag.LeaseKindId = new SelectList(db.LeaseKinds, "LeaseKindId", "LeaseKindTitle", dossier.LeaseKindId);
            ViewBag.OwnerShipStateId = new SelectList(db.OwnerShipStates, "OwnerShipStateId", "OwnerShipStateTitle", dossier.OwnerShipStateId);
            return View(dossier);
        }