How to disable ValidationMessageFor for the first time?

Hi.

I use NC 3.90

I use Anonymous Guest Checkout + OnePageCheckout. Then I have Disabled "Billing address" step (in Order Settings.

My problem is that it always shows Validation Error Messages even on Checkout Start. I was trying to figure out what causes it and couldn't find.

If I enable Billing Address it works fine and Validation Errors won't show. Also, if I disable OnePageCheckout it also works fine.

These errors come from \Views\Shared\_CreateOrUpdateAddress.cshtml

Piece of code:

<div class="edit-address">
    <div class="inputs">
        @Html.LabelFor(model => model.FirstName, new { }, ":")
            @Html.EditorFor(model => model.FirstName)
</div>
        @Html.RequiredHint()
        @Html.ValidationMessageFor(model => model.FirstName)
    </div>
    <div class="inputs">
        @Html.LabelFor(model => model.LastName, new { }, ":")
            @Html.EditorFor(model => model.LastName)
</div>
        @Html.RequiredHint()
        @Html.ValidationMessageFor(model => model.LastName)
    </div>

How can I solve this?
Or how to disable these error message only for the first time?


Thanks in advance.