Pjax with ActiveForm, inside ActiveForm perhaps?

Question

Yii

Hello! Tell me , please,
There is a form (ActiveForm) of model1 on the page.
Inside this form is a pjax block with another ActiveForm form for adding information to model2.
When the model2 form submits, pjax is not processed and the model1 form submit occurs.
Tell me how to implement correctly? Or is it wrong to do so?

$form1 = ActiveForm::begin();
   Pjax::begin(['id' => 'notes']);
     $form2 = ActiveForm::begin(['action' => '/note/save', 'options' => ['data-pjax' => '1']]);
        $form2->field($notes, 'text')->textarea(['rows' => 3]);
        Html::submitButton('Add', ['data-pjax' => '1'])
     ActiveForm::end();
   Pjax::end()
ActiveForm::end();

Answer 1

Nested forms are against the HTML standard.