Validation not working

The validation doesn’t do anything on the backend for admin users. It’s for the public-facing form only. This is so administrators can edit the records however they want. If you want to add new records and enforce validation, set up a “signup” form on the frontend somewhere (on a private page maybe) where the new records can be added.

Another approach is to add the record as a “editor” if someone is logged in as an “editor” the validation rules are enforced in the backend.