Required attribute not working in ASP.NET

Question

I have created this C# file to be scaffolded in ASP.NET 5.0. The problem is I do not want the home number to be required yet the generated page (controller with Entity Framework) Create still counts it as such. Any idea why id this happening?

public class Patient
    {
        [Key]
        public string MRN { get; set; }
        [Required]
        public string FirstName { get; set; }
        [Required]
        public string MiddleName { get; set; }
        [Required]
        public string LastName { get; set; }
        [Required]
        public string Address { get; set; }
        [Required]
        public string Gender { get; set; }
        [Required]
        [Display(Name = "Mobile Number")]
        public int MobNumber { get; set; }       
        [Display(Name = "Home Number")]
        public int HomeNumber { get; set; }      
        [Required]
        public string Nationality { get; set; }
            

    }

Here is the code for Create.cshtml, the weird thing that it used to work, now every time I try to generate the controller along with the views, the Home Number is required.

@{
    ViewData["Title"] = "Create";
}

<h1>Create</h1>

<h4>Patient</h4>
<hr />
<div class="row">
    <div class="col-md-4">
        <form asp-action="Create">
            <div asp-validation-summary="ModelOnly" class="text-danger"></div>
            <div class="form-group">
                <label asp-for="MRN" class="control-label"></label>
                <input asp-for="MRN" class="form-control" />
                <span asp-validation-for="MRN" class="text-danger"></span>
            </div>
            <div class="form-group">
                <label asp-for="FirstName" class="control-label"></label>
                <input asp-for="FirstName" class="form-control" />
                <span asp-validation-for="FirstName" class="text-danger"></span>
            </div>
            <div class="form-group">
                <label asp-for="MiddleName" class="control-label"></label>
                <input asp-for="MiddleName" class="form-control" />
                <span asp-validation-for="MiddleName" class="text-danger"></span>
            </div>
            <div class="form-group">
                <label asp-for="LastName" class="control-label"></label>
                <input asp-for="LastName" class="form-control" />
                <span asp-validation-for="LastName" class="text-danger"></span>
            </div>
            <div class="form-group">
                <label asp-for="Address" class="control-label"></label>
                <input asp-for="Address" class="form-control" />
                <span asp-validation-for="Address" class="text-danger"></span>
            </div>
            <div class="form-group">
                <label asp-for="Gender" class="control-label"></label>
                <input asp-for="Gender" class="form-control" />
                <span asp-validation-for="Gender" class="text-danger"></span>
            </div>
            <div class="form-group">
                <label asp-for="MobNumber" class="control-label"></label>
                <input asp-for="MobNumber" class="form-control" />
                <span asp-validation-for="MobNumber" class="text-danger"></span>
            </div>
            <div class="form-group">
                <label asp-for="HomeNumber" class="control-label"></label>
                <input asp-for="HomeNumber" class="form-control" />
                <span asp-validation-for="HomeNumber" class="text-danger"></span>
            </div>
            <div class="form-group">
                <label asp-for="Nationality" class="control-label"></label>
                <input asp-for="Nationality" class="form-control" />
                <span asp-validation-for="Nationality" class="text-danger"></span>
            </div>
            <div class="form-group">
                <input type="submit" value="Create" class="btn btn-primary" />
            </div>
        </form>
    </div>
</div>

<div>
    <a asp-action="Index">Back to List</a>
</div>

@section Scripts {
    @{await Html.RenderPartialAsync("_ValidationScriptsPartial");}
}

Answer 1

If you don't want values to be required, you should make them nullable:

[Display(Name = "Home Number")]
public int? HomeNumber { get; set; }