Valid from and Valid to are not getting copied to follow up document.

Hi Experts,

I am creating job quote as a follow up document from master quote.All are getting copied from the master quote to job quote,but valid from and valid to dates are not getting copied from master quote,instead it is calculating the date from date profile rules.

But I need to transport the dates from Master Quote to Job Quote.

Please advice.

Thanks,

Adi.