Exclude first option in Select from Validation

Hey! I would love to not allow to submit the form if the first option of Select is selected in the form. In other words I would want to exclude the first value from validated. Could it be done with Custom Attributes?

I have found a custom code to not allow to select the first option. But if the user doesn’t touch it at all he can still submit the form as Webflow treat the first option (which I use as a placeholder) as selected and pass the validation.

Here is my site Read-Only: LINK
(how to share your site Read-Only link)

If the first option has no value it should not pass validation. This is default form behavior that requires no custom code.

You can see that here: W3Schools Tryit Editor