how to map csv to update landed costs on inbound shipment

Dear all,

i try to update vis csv import the landed cost on on inbound shipment, in order to save time and to avoid to have to go on eache line of the inbound shipment manually

i have the mapping below, where i put the PO internatl,

regarding the items/associated items, i put the ID i can read on the inbound shipment :

i don't succeed to update it, get the error message "an unexpected error has occured"

have somebody an example of template to update via csv the landed on a inbound shipment ?

thanks in advance for your support