Hi Karan,
I guess your delivery types or item categories are relevant for transportation.
If this should not be the case uncheck the corresponding delivery and item types in SPRO > Logistics Execution > Transportation > Shipments > Maintain Transportation Relevance.
As for updating the status of an open delivery (open for transaportation) the only way is to achieve this would be to create and update subsequent shipment document (or maybe cancel GI posting in VL09 and delete delivery; then re-create it and post GI; but this of course just in case you do not send any EDI communication etc. depending on your shipping flow and its config).
Hope this helps!
Cheers,
Tomas
