diff --git a/app/controllers/organisations_controller.rb b/app/controllers/organisations_controller.rb
index d2546dd28..38c21d851 100644
--- a/app/controllers/organisations_controller.rb
+++ b/app/controllers/organisations_controller.rb
@@ -91,7 +91,7 @@ class OrganisationsController < ApplicationController
     selected_rent_periods = rent_period_params[:rent_periods].compact_blank
     @organisation = Organisation.new(org_params)
     if @organisation.save
-      @organisation.update(group: assign_group_number(@organisation.id, org_params[:group_member_id])) if org_params[:group_member]
+      @organisation.update!(group: assign_group_number(@organisation.id, org_params[:group_member_id])) if org_params[:group_member]
       OrganisationRentPeriod.transaction do
         selected_rent_periods.each { |period| OrganisationRentPeriod.create!(organisation: @organisation, rent_period: period) }
       end