It is not the identifications that are missing, it is the media. It is because you have no photo or sound file attached. This is perfectly fine to do as an observation (I have 10,000 plus of these)
If you are doing this via the website, there is actually a selection under the ‘Add’ dropdown on the top left to add a record with no photos.
You can still save and submit this and it will go through as a normal observation with no photo.
If you are actually trying to add a photo, that is what is not there.
EDIT - rereading your post it is clear you want to add a no photo record (sorry, just got home from work and have not turned my brain back on yet), so the recommendation about the add dropdown is what you want.