doing silly dance to get correct field highlighted on the error

app/controllers/schemes_controller.rb

@@ -34,6 +34,8 @@ class SchemesController < ApplicationController
     if @scheme.save
       render "schemes/primary_client_group"
     else
+      @scheme.errors.add(:organisation_id, message: @scheme.errors[:organisation])
+      @scheme.errors.delete(:organisation)
       render :new, status: :unprocessable_entity
     end
   end

app/models/scheme.rb

@@ -10,8 +10,6 @@ class Scheme < ApplicationRecord
   scope :search_by_postcode, ->(postcode) { joins(:locations).where("locations.postcode ILIKE ?", "%#{postcode.delete(' ')}%") }
   scope :search_by, ->(param) { search_by_postcode(param).or(search_by_service_name(param)).or(search_by_code(param)).distinct }
 
-  validates :organisation_id, presence: { message: I18n.t("validations.scheme.organisation_id_missing") }
-
   SENSITIVE = {
     No: 0,
     Yes: 1,

config/locales/en.yml

@@ -44,12 +44,9 @@ en:
         scheme:
           attributes:
             organisation:
-              required: ""
+              required: "Enter the organisation’s name"
 
   validations:
-    scheme:
-      organisation_id_missing: "Enter the organisation’s name"
-
     organisation:
       name_missing: "Enter the organisation’s name"
       provider_type_missing: "Select the organisation’s type"