Rendering the same form twice on the page gives a captcha already been rendered error

I have a form that appears on the page but might appear/get rendered again **on the same page** when a user clicks a modal button.

The problem is that I get the following error if that form is being rendered twice on the page:

Error: reCAPTCHA has already been rendered in this element at Object.Hr [as render]

How do I solve this?