If you just want to change the photos you don't have to delete the listing.
Click the listing (on the listings tab). Click the photo section. Add the new photos to the correct rooms and delete any old photos that you don't want to use anymore. Inside each room folder, be sure to also select the correct descriptions for beds, bathroom amenities, etc.
If you delete a listing you lose all your reviews also from that listing. So if you have a listing that's in good standing and you have good reviews with it just keep the same one you can change every single thing about it if you want you can change every single picture you can change the room it is even