Inbound delivery creation with external number using DESDAV message type

Hi

I have a problem with replicating inbound delivery using external number range with message type DESDAV and IDOC type DELVRY01 to 05.

I am passing the value in field E1EDL20 - VBELN as external number (this interval is assigned to document type). But this number is updated in the field of reference document number (EKES-XBLNR) instead of Inbound delivery number (EKES-VBELN).

Can you suggest me to create inbound delivery with external number range using IDOC?

Thanks in Advance