Demand Scheduling - Edoc with 2 items with supply from multiple BP's

Hi,

In  a Edoc we have 2 items, item 'A' supplied by X branch and item 'B' be supplied by Y branch, in this case we are getting error message from R47171 is run as error code "105"  = Schedule has mixed Branches. In this case does the report doesn't process this scenario where there is supply from 2 BP's or is that if multiple supply exists is that items needs to be in different edocs.

Please advise how to process this without errors