Why did my delete request fail on a non-id primary key?

Known limitation — Delete and id_column

On Core, unlike Update, Delete does not currently accept id_column — it always matches against the id column. If your model''s primary key isn''t literally named id (e.g. prod_id), deleting through this endpoint won''t work yet. Workaround: delete records with a non-id primary key directly through the console instead.