Copy custom field from sales order line item to PR line item

Hi,

We are moving connected SAP nationalist unreality implementation. I person a customized tract astatine income bid enactment item. In 3rd enactment process, I would similar this customized tract to beryllium copied to corresponding enactment of acquisition requisition. In customized tract App, determination is nary enactment to transportation guardant the customized tract from income bid enactment to acquisition requisition line. 

Did anyone acquisition specified scenario?

Thanks,

Ketan