Why doesn't validation work when I change id in Select2?

Question

Yii

If you set your id to Select2, then the validation that you specified in the rules stops working... Without this id, everything works, and if, for example, the field is empty, it is highlighted in red, but not with id. What is it connected with? I must say right away that I definitely need another id.

<?= $form->field($a_model, 'regions')->widget(
    Select2::classname(), [
        'options' => [
            'id' => 'tp_addresses-regions',
        ],
    ])
?>