Delete a field

Removes a field from the board (card values already stored for it are left in place). Refused for standard fields (name, stage, description, tags, checklist, files, lastAction, dueAt, relatedContacts), locked, mirror and integration-managed fields (403), and - as in the Aptly app - for a field used by a saved filter, or by a workflow or automation that runs off one (409 CONFLICT, with the dependents in meta). Requires update permission and "Edit Boards" access (not needed on a board that same key created).