How To Fix MDG_MDF8107 - New key fields are not possible

SAP Error Message - Details

• Message type: E = Error

• Message class: MDG_MDF8 - Change Management

• Message number: 107

• Message text: New key fields are 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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message MDG_MDF8107 - New key fields are not possible ?

  The SAP error message MDG_MDF8107 ("New key fields are not possible") typically occurs in the context of Master Data Governance (MDG) when there is an attempt to create or modify a master data record with key fields that are not allowed or are not defined correctly in the system.
  Cause:
  
  
  Key Field Configuration: The error often arises when the key fields for a master data type are not properly configured in the MDG data model. This can happen if:
  
  The key fields are not defined in the data model.
  The key fields are being changed or added in a way that violates the existing configuration.
  
  
  
  Data Model Restrictions: The data model may have restrictions on which fields can be used as keys. If you attempt to use a field that is not designated as a key field, this error will occur.
  
  
  Inconsistent Data: If the data being submitted for creation or modification does not conform to the expected structure or rules defined in the MDG configuration, it can trigger this error.
  
  
  Solution:
  
  
  Check Data Model Configuration:
  
  Review the data model configuration in the MDG system to ensure that the key fields are correctly defined.
  Ensure that the fields you are trying to use as keys are indeed marked as key fields in the data model.
  
  
  
  Review Change Request:
  
  If you are working with a change request, ensure that the changes you are trying to make do not violate any constraints set in the data model.
  Make sure that you are not trying to create a new key field that is not allowed.
  
  
  
  Consult Documentation:
  
  Refer to the SAP documentation for your specific version of MDG to understand the rules and configurations related to key fields.
  
  
  
  Testing:
  
  If possible, test the creation or modification of the master data record in a development or test environment to identify the specific conditions that lead to the error.
  
  
  
  Seek Help from SAP Support:
  
  If the issue persists and you cannot identify the cause, consider reaching out to SAP support for assistance. Provide them with details about the data model, the specific actions you are trying to perform, and any relevant configuration settings.
  
  
  
  Related Information:
  
  MDG Data Model: Understanding the structure and configuration of the MDG data model is crucial for troubleshooting this error.
  Key Fields in SAP: Familiarize yourself with how key fields are defined and used in SAP systems, particularly in the context of master data.
  SAP Notes and Community: Check SAP Notes for any known issues or patches related to this error message. The SAP Community forums can also be a valuable resource for finding solutions shared by other users.
  
  By following these steps, you should be able to identify the cause of the MDG_MDF8107 error and implement a solution to resolve it.