though the po line items deleted , quantity is showing in MD04

Dear Gurus,

My requirement is user wants to delete the po from sap, because some wrong design occured for the materials.

i proposed to delete the line items and save dthe po but still in MD04  the requirement is showing but it should nt happen

i have two optionsone is to delete the po from sap(user requirement)

Second one is the quantity should nt appear in MD04, please share your valauble explanatios. i have searched in google a lot please provide solution withyb detailed explanation for the above two options.