How To Fix V1384 - Sales unit &1 is not defined for item &2

SAP Error Message - Details

• Message type: E = Error

• Message class: V1 - Verkaufsbelegbearbeitung

• Message number: 384

• Message text: Sales unit &1 is not defined for item &2

What causes this issue?

Sales unit &V1& is not allowed in item &V2&.
Possible reasons could be:
the conversion factor sales unit - stockkeeping unit could not be
determined
the entry for the dimension or the internal unit of measurement is not
maintained in Customizing
different dimensions in the sales unit - stockkeeping unit, that cannot
be converted
INCLUDE 'NA_NO_PROCESSING_1' OBJECT DOKU ID TX LANGUAGE E
INCLUDE 'NA_CHECK_ENTRY' OBJECT DOKU ID TX LANGUAGE E
the sales unit has not been maintained for the material
the unit of measure group does not include the sales unit
If the entries are correct, select a different, reliable sales unit or
check whether the reasons mentioned above apply.

Error message extract from SAP system. Copyright SAP SE.