### Bug report

The Validator shows a duplicated error message when validating a CheckBox.

### Reproduction of the problem

1) Create a standard HTML form with a checkbox, which has two inputs - a visible one with value="true" and a hidden one with value="false" (this is the generated HTML markup when using <input asp-for="@Model.IsChecked" /> or Telerik UI for ASP.NET Core CheckBox component).

2) Initialize a Kendo UI Validator on the form and create a custom rule for the checkbox editor.

3) Submit the form and review the duplicated error message in the validation summary. The Validator validates both hidden and visible inputs.

A Dojo sample for reproduction: https://dojo.telerik.com/YoLKDPZQ

### Expected/desired behavior

A single error message must be displayed when the checkbox is not checked and the form is submitted.

### Environment

* **Kendo UI version: 2025.2.702
* **jQuery version: 3.7.1
* **Browser: [all]