How To Fix MDG_DT_DATA_MODEL128 - &1 is not in SAP delivery namespace; edit not possible

SAP Error Message - Details

• Message type: E = Error

• Message class: MDG_DT_DATA_MODEL - Messages for the Configuration Workbench Model Access API

• Message number: 128

• Message text: &1 is not in SAP delivery namespace; edit not possible

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message MDG_DT_DATA_MODEL128 - &1 is not in SAP delivery namespace; edit not possible ?

  The SAP error message MDG_DT_DATA_MODEL128 indicates that you are trying to edit a data model that is not in the SAP delivery namespace. This typically occurs in the context of SAP Master Data Governance (MDG) when you attempt to modify or create a data model that is either custom or not properly defined within the expected namespaces.
  
  Cause:
  
  Namespace Issue: The data model you are trying to edit is not part of the SAP standard delivery namespace (which usually starts with /SAP/). Instead, it may be in a custom namespace or not defined correctly.
  Authorization: You may not have the necessary authorizations to edit the data model.
  Configuration Error: There may be a configuration issue in the MDG setup that is preventing access to the data model.
  
  
  Solution:
  
  Check Namespace: Verify that the data model you are trying to edit is indeed in the correct namespace. If it is a custom model, ensure that it is