There currently isn’t a way to address this. These hidden fields are uses in AJAX and PHP code when a form is submitted. They need to be available in each form. If they were prefixed then JS and PHP would not be able to easily use them.
Are these forms that must be separate forms with their own submit button? Do they all create and update the same WP object? A single form with all of the fields combined would currently be the only way to solve this issue.
I suggest that anyone needing to have multiple form on a page contact the developer here https://www.advancedcustomfields.com/contact/
