Update UOM Values After Creating an Item
You can update the primary unit of measure of a new item request-enabled item, in the draft status.
If the item is a part of a structure, after you update the UOM, you must check and manually update items in any impacted structures.
Note: The primary unit of measure won’t be editable for approved items
on new item request classes and non-new item request classes. For information about the
checks performed when the primary UOM is updated, see Checks Performed for Item
Attribute Changes section.