How to prevent entering request date and promise date in the past when creating a sales order line o

Hi

When creating a sales order, user can enter any date in field Request Date and Promise Date, even dates in the past.

See enclosed print screen: I created a new sales order and entered 01-01-1545 as Request Date and Promise Date.

Oracle let me do so and it did not even warn me about the dates being in the past.

Oracle also do not warn or block if users enter dates in the past while modifying the Request Date or the Promise Date.

All our plannification is made on these dates; therefore we need user not to be able to enter dates in the past.