How To Fix USMDZ009 - Optional key fields not allowed for this scenario

USMDZ009 - Overview

• Message type: E = Error

• Message class: USMDZ - Nachrichten für MDGF Datenmodell (ohne Validierung)

• Message number: 009

• Message text: Optional key fields not allowed for this scenario

Self-Explanatory Message

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USMDZ009 - Details

• The SAP error message USMDZ009 indicates that optional key fields are not allowed for the specific scenario you are working with in the SAP Master Data Governance (MDG) environment. This error typically arises when you are trying to create or change master data and have included fields that are marked as optional in a context where they are not permitted.
  
  Cause:
  
  Incorrect Field Configuration: The fields you are trying to use may be configured as optional in the data model, but the specific scenario (like a certain workflow or process) does not allow optional fields.
  Data Model Restrictions: The data model may have restrictions that require certain fields to be mandatory for the specific operation you are performing.
  Validation Rules: There may be validation rules in place that enforce the requirement of certain fields being filled out, even if they are marked as optional in other contexts.
  
  
  Solution:
  
  Review Data Model Configuration: Check the configuration of