How is it possible to select the original item while using a substitute item in a transfer order?

Summary:

During pick release for a transfer order, when the original item does not have enough on‑hand quantity, the system automatically substitutes the full requested quantity with the associated substitute item even if some quantity of the original item is available. The system does not split the pick between original and substitute items, and the picking UI does not allow selecting or manually picking the remaining quantity of the original item. You are looking for a way to have the system pick partially from the original item and partially from the substitute item.

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