Close PO automatically with GR

Hello all,

As far as I know, when I create a PO and the correspondent Goods Receipt I can still change the price of the material in the PO.

Is there any way to close the PO to block prices and other definitions to be changed in an automatic way? After the GR is created, all the lines, in the PO, that were fully delivered get closed.

I'm aware of the definition in the PO that allows me to block the lines, however, I need that the system closes the PO lines after the GR.

Thanks in advance,

Kind Regards,

Miguel