Validation at the time of PO Creation

Hello SME,

Version : R12.1.3

PO Need By Date is defaulted from PR Need By Date.

Sometime PO line is cancelled because of change in Supplier.

Due to PO line cancellation, corresponding PR line gets released and in case, PR Need By Date becomes less than Today date .

Now, when we are creating a PO for such PR line, the need by date < Today date and Need By Date < PO creation date, which is wrong.

How can tackle such case at the time of Autocreate a PO ?

In standard functionality, it doesn't prevent at the time of making PO and it goes for approve process as well.