How to disallow Price Update once the Goods has been Received?

Summary:

How to disallow Price Update once the Goods has been Received?

Content (required):

1.Create PO and approve it.

Unit Price :100,QTY:50

2.Receive goods

amount should be 100*50

3.Update unit price to 200

4.Send pay on receipt to generate invoice

5.Invoice generated with new price

200*50

Version (include the version you are using, if applicable):

22D

Code Snippet (add any code snippets that support your topic, if applicable):