Bulk Smush Original Images: is it possible?

Hi,

I have a site with tons of images.
I'm using WP Smush pro but haven't checked "Smush Original Image" until then.
I'd like to smush all the original images now, so I checked this option.
But I can't smush in bulk because that says all my images are currently smushed.

What can I do?

Thanks!
Best Regards