Unit of measure & not defined as commercial unit

What causes this issue?

The key of the unit of measure you entered is not defined as a
commercial unit.


&WHAT_TO_DO& (system administrator)
Check the definition of the unit of measure via Customizing.
<DS:SIMG.SIMG_CFMENUOLMSOMSC>Check units of measurement</>

Error message extract from SAP system. Copyright SAP SE.