No purchase order item was generated for shipment cost item

Hi Gurus,

When I am creating with reference to shipment no & shipment cost type, When I save the shipment cost, See the logs at the time saving.

The logs are showing in red :

No purchase order item was generated for shipment cost item.

Message no. VY633

Please enter a valid partner role.

Message no. ME351

May I know the reason for showing red logs at the time of saving. (When I check logs, it is showing red colors).

Please advice if I miss any thing.

Regards

Rakesh