Service Order Replication

Hi Experts,

I created a service order in CRM with spare part item. Now sales order should be created in ECC. I maintained same transaction type and item category in ECC too. After saving the order, the BDocs are green in colour but with error as follows,

item is not to invoice0000000010

Message no.000

What are the configurations required for creating a sales order in ECC based on CRM service order spare part item.

Thanks & Regards,

A.Lakshith Rao