STO query

hi gurus,

I have a small doubt.

when an STO is created (intra company), In the header field the Inco terms is not populating.

It gives a value in the Inco terms in the item details.

The inco terms is a mandatory field while creating the vendor master (sites), and there is a value maintained in the site.

why is the system does not picking up the header inco terms automatically??

thanks

regards,

kumar