If the reference UOM of a UOM changes, relabel the sample conversion immediately
If you add or edit a UOM and change the reference UOM when the method type is "Simple", the sample conversion will not reflect this change unless the factor or the offset is edited.
Instead, the change in the reference UOM should be reflected immediately in the sample conversion.
Kenneth Barber commented
sample conversion = the number of reference UOM per unit of the UOM that you are editing