End users created sales orders and saved, when trying to make delivery system through error
No delivery-relevant items in order 00000xxxx, order type xxxx
Message no. VL455
The sales order you want to deliver, sales order 00000xxxx with order type xxxx, either contains no delivery-relevant items or its delivery-relevant items have already been delivered.
After analysis i come to know that in schedule line 'item relevant for delivery' field was unchecked, i checked it present system is allowing delivery and billing.
But Present problem is the sales orders which were created before this configuration were not able to deliver. system through same error.
how to overcome this,