Restriction in PO Change after released

[mohit9210]

Dear Experts,

After release, the user should not be able to change the PO header text for a Purchase Order (PO). If any PO text is changed, the PO should automatically be unreleased at all levels.

How can we implement this restriction in SAP?

PLM Enterprise Asset Management (EAM)/Plant Maintenance (PM) SAP Plant Connectivity MM (Materials Management) 

[ParshramUtekar]

Hi,
if your requirement is ones Purchase order is released then user can not be change P.O.

Go to IMG setting- Material management-Purchasing-Purchase order- Define Release procedure for purchase order- Release indicator