RE: I need to change the units type of an item
“After you assign a units type to an item, the item’s unit type cannot be changed. Also, after a unit type is assigned to any item, the units type cannot be edited except to add more units.”
In the past we have renamed (Ex. add XXX to start of item name) and reimported the items with the correct units type. This allows you to keep the same item name and create the item with the correct units, the downside is you lose the transaction history but we could not find an alternative.