Editors and form validation are where this gets tricky. The user isn't just reporting new, independent observations to append to a log. They're looking at exist

Editors and form validation are where this gets tricky. The user isn't just reporting new, independent observations to append to a log. They're looking at existing state and deciding how to react to it. Sometimes avoiding constraint violations with other state that they're not looking at is also important. It often works out, but if you're not looking at the right version then you're risking a merge conflict.