For an item that already has a P18, do not add another one #3333
Description
The Nearby activity now also shows Wikidata items that have a P18 image. That's great.
But when the user choose to add an image based on this item, the image should not be added as an another P18.
Why? Because a Wikidata item should only have one P18 image. By the way, the selection of the most representative image is sometimes the result of a community conversation, so replacing the existing image is probably not a good idea either.
The item's information can still be used to propose categories/etc, though, so it makes sense to keep the + even for items that already have a P18.
I tag this as a bug because I have to clean up manually behind haha.