How to correct Product receipt quantity from 2 POs in AX 2012?

Hi everyone,

I do PO product receipt for 2 different POs in 1 product receipt number (receipt 10 Item A from PO1, 20 Item B from PO2). After that, I want to revise received quantity of Item B from 20 to 15. I try to use Correct function but system only show the line of Item A for correction.

Does anyone has the same error with me and any advice for this issue?

Thanks so much.