Netsuite has a standard way to reallocate items that are already committed to an order.
For that, we need to go to Transaction > Order management > Reallocate Item
There we need to select the item we need to reallocate and then the Location.
The current Quantity On Hand, Quantity Committed, and Quantity Required to fulfill all orders are displayed at the top of the page.
The orders that include that item will be listed down below showing the Order Number, Date, Customer, Quantity Ordered, Quantity Remaining, and the current Quantity Committed
In the Quantity Committed field, accept, increase, or reduce the number of items committed to each order.
The total Quantity Committed of all orders cannot exceed the Quantity On Hand.
Click Submit.
You can view the updated committed quantities on the orders. When you reallocate items and commit less than the complete quantity, NetSuite adjusts the Commit column setting of the order. The setting switches from the Complete Qty to the Available Qty status for the affected order lines.
You can also view the updated inventory levels on item records.