Invoice split

Hi,

We have problem in normal scenario.

Our requirement is to have one invoice for two different deliveries.( two deliveries belongs to two separate sales orders )

All the header data is same.

At the time of creating billing document from two delivery documents (VF01), System is showing split analysis as follows

Split due to different header data

Fld Name $000000001 $000000002

Number of foreign trade data i 0000003421 0000003422

How to get rid of this

The number 3421 & 3422 are seen in the delivery document – foreign trade data – organization

Pl. help.

Ravi