how to cancel a split line for Internal material transfer

Summary:

We have a transfer order (TO) created in Inventory Management and sent to Order Management as an IMT. This order has two lines but it is impossible to send the total quantity requested, only what was partially shipped, for this reason, Split lines were created in a status awaiting shipment. However, these lines will not be dispatched and must be canceled so that the TO is closed.

How can you modify the order quantity before shipping so that line splits are not generated? or

What is the correct procedure to do it?

If we reduce the requested quantity to the previously shipped quantity and do click on summit, The changes are not saved on the Manage transfer order screen or on the order screen in OM