So let's say:
- You uploaded an image
- You found a higher quality version of the same image
- You have a possibility to update your previously uploaded image with the new higher quality one by having a dedicated tool in the tools category (it might or might not need an approval of a staff member for it to be updated)
A possible variation: Every user is able to request a quality update to any image on the website - it will be replaced after an approval of either the original uploader or a staff member