You just have to remove this image from your product page, then upload another image (or just change the name before uploading).
I did do that several times. As I mentioned above it's acting weird. I uploaded the image that I want but another image is showing - not the one that I add, and NOT the one that I see in the backend, a totally different image is showing. This is why I want to remove it entirely from the website.
The image name is linked to the product code so I need to use the same image name. If I cannot delete it entirely I will ask the client to change the code so we can use a different name.
Thanks!!