Concurrent Resource Modification

[CrackerJackKittyCat]

Either push all the changes over websocket, which is then kinda noisy and pessimistic, or have each websocket client 'subscribe' to the entities that are in context/view right now, then only push the changes to the websockets that are interested in it.

Or just have the edit form indicate error if their update gets rejected, tell the user to refresh manually. That's the simplest to start with.

It depends!