Sometimes we need to amend SO after it has been submitted. And this SO has already MR and PO linked with it. By doing this, we need to cancel the PO and MR and re-generate a new MR and PO after we amend the SO. This creates problem as sometimes we have already sent the PO to vendor and it is difficult for us to change the PO number with them. Is there a way to just amend the original MR and PO to reflect the changes after we amend the SO so that we can keep the MR and PO number (instead of creating new MR and PO)?
What is the use case? Changes are usually done at quotation stage. Maybe you can try smaller quantities or STOP the sales order and create a new one.