How To Fix MDG_VALUE_MAPPING104 - Ext. code &1 is already used and no default for inbound mapping is set

SAP Error Message - Details

• Message type: E = Error

• Message class: MDG_VALUE_MAPPING -

• Message number: 104

• Message text: Ext. code &1 is already used and no default for inbound mapping is set

What causes this issue?

More than one mapping exists for external code &V1&. The system only
permits multiple mappings if exactly one entry is marked as default for
inbound mapping.

System Response

The system does not allow you to save this entry.

How to fix this error?

Choose from the following options:
Change the external code
Set exactly one of the entries as default for inbound mapping

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MDG_VALUE_MAPPING104 - Ext. code &1 is already used and no default for inbound mapping is set ?

  The SAP error message MDG_VALUE_MAPPING104 indicates that there is an issue with value mapping in the Master Data Governance (MDG) module. Specifically, the error states that an external code (represented by &1) is already in use, and there is no default mapping set for inbound processing. This typically occurs when you are trying to import or synchronize data, and the system cannot find a valid mapping for the external code provided.
  Cause:
  
  Duplicate External Code: The external code you are trying to use is already associated with another entry in the value mapping table.
  Missing Default Mapping: There is no default mapping defined for the external code, which means the system does not know how to handle this code during the inbound process.
  Configuration Issues: The value mapping configuration may not be set up correctly, leading to conflicts or missing entries.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Existing Mappings:
  
  Go to the value mapping configuration in your SAP system.
  Look for the external code that is causing the error and check if it is already mapped to another internal code.
  
  
  
  Define a Default Mapping:
  
  If the external code is valid and should be used, ensure that a default mapping is defined for it.
  You can create a new mapping entry that includes the external code and the corresponding internal code.
  
  
  
  Remove Duplicate Entries:
  
  If the external code is indeed a duplicate and should not be used, consider removing or updating the existing mapping that conflicts with the new entry.
  
  
  
  Review Configuration:
  
  Ensure that the value mapping configuration is correctly set up in the MDG system.
  Check if all necessary mappings are defined and that there are no gaps in the mapping logic.
  
  
  
  Testing:
  
  After making changes, test the inbound process again to ensure that the error is resolved.
  
  
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes like MDGIMG to access the configuration settings for value mapping.
  Documentation: Refer to SAP Help documentation for detailed guidance on value mapping in MDG.
  Support: If the issue persists, consider reaching out to SAP support or consulting with an SAP expert who specializes in MDG.
  
  By following these steps, you should be able to resolve the MDG_VALUE_MAPPING104 error and ensure that your data import or synchronization processes run smoothly.