Hi Sachin,
Status was initially QS20. As suggested by you, I have corrected it to QS30 to solve the error
Update of sales order rec1 not allowed as vehicle action QOOU is not allowed based on the action matrix configuration manintained in OVELO11. But now I think,status should be QS20 for performing assign vehicle action. But for this vehicle, it is not working as it is trying to update the previous sales order which is intercompany sale order.
REgards,
Manasa