SAP Message AC421 - The unit of measure is being adapted (-> Help)

Diagnosis
When processing assets, you cannot enter a quantity without a unit ofquantity. Therefore the system adapts the entry for the unit ofquantity to the entry for the quantity.
Independent of this, the system also allows for separate handling ofthe maintenance level. This method allows, for example, the unit ofquantity to be specified at the level of the asset class, but thequantity itself to be managed at the level of the asset.

Procedure
Check the action carried out by the system.