SAP Message VL020 - The doc.no.does not fall within the no.range defined for external nos.

Diagnosis The document number entered is not within the authorizednumber range for external number assignment. INCLUDE 'NA_NO_PROCESSING_2' OBJECT DOKU ID TX LANGUAGE E INCLUDE 'NA_CHECK_ENTRY' OBJECT DOKU ID TX LANGUAGE E DEFINE &FELDNAME& = 'Delivery' INCLUDE 'NA_POSSIBLE_ENTRY' OBJECT DOKU ID TX LANGUAGE E