Fields mandatory in PO

Hai Friends,

I have one question.

My customer wants to put same fields as mandatory in Purchase order, Which were there in ME21N --- Item - > Material Data ---

Vendor mat. no. EAN/UPC

Table / field name details : -

*Vendor mat. no.*

Table Name MEPO1319

Field Name IDNLF

Data Element IDNLF

*EAN/UPC*

Table Name MEPO1319

Field Name EAN11

Data Element EAN11

How to put these fields as a mandatory ?

Helpful Answer