slapos_subscription_request: add one more assertion

master/bt5/slapos_subscription_request/SkinTemplateItem/portal_skins/slapos_subscription_request/SubscriptionChangeRequest_validateIfSubmitted.py

@@ -58,6 +58,10 @@ subscribed_item = open_order_movement.getAggregateValue(portal_type=['Instance T
 if subscription_change_request.getAggregateUid() != subscribed_item.getUid():
   return invalidate(subscription_change_request, 'Unhandled requested changes on: aggregate')
 
+# Ensure destination is different
+if subscription_change_request.getDestination() == open_sale_order.getDestination():
+  return invalidate(subscription_change_request, 'Expected change on: destination')
+
 # Create new Open Sale Order
 next_open_sale_order = subscription_change_request.SubscriptionRequest_createOpenSaleOrder()
 current_date = getClosestDate(target_date=next_open_sale_order.getCreationDate(), precision='day')
@@ -87,4 +91,4 @@ elif subscribed_item.getPortalType() == 'Project':
 else:
   raise NotImplementedError('Not implemented subscribed item')
 
-return invalidate(subscription_change_request, 'Unknown requested changes')
+return invalidate(subscription_change_request, 'New open order: %s' % next_open_sale_order.getRelativeUrl())