How to handle 1 line item with 1 GR, but several IRs

Hi,

We have a secarnio that some vendors issue 2 invoices for 1 line item on PO, but there is only 1 GR: 90% of the total amount on the 1st invoice, final 10% on the 2nd invoice. It becomes a problem on the IR. Do you have any suggestions?

Thank you!

B.rgds,

Stephanie