we deleted products and its associated images from
However, the images re-appear, not the original image, but the placeholder picture. So the link (e.g. www.xyz.com/pub/media/catalog/product/cache/99d67668879640f750d07dab82e3559f/3/8/38669-b_1-0.5x.jpg) is still active, and does not generate a 404 page.
Thats a problem, because we want to delete the cache of search engines, e.g. with the removal tool of bing. And, if there is still a working link, the cache of bing and the original picture does not get deleted.
How to get rid of these ghost placeholder images?