Batch fix metadata

I have a lot of images with old srcset metadata. They have a medium-large size which I don’t use anymore and the images have been removed, but they still show in the srcset.

This plugin works great for fixing this problem, when I regenerate the medium-large size is removed from the metadata and the large size is added, which is exactly what I need.

But, I need to do this for thousands of images. Is there really no way to batch the regenerate?

Thanks in advance for any help you could provide!