How To Fix USMD1590 - Data model &1, foreign key relationship &2: Field assignment missing

SAP Error Message - Details

• Message type: E = Error

• Message class: USMD1 - Datenmodel

• Message number: 590

• Message text: Data model &1, foreign key relationship &2: Field assignment missing

What causes this issue?

You have specified the attribute &V2& as a key field. You still need to
assign the attribute in a foreign key relationship.

System Response

The data model cannot be saved or activated.

How to fix this error?

Edit the fields in the <LS>Fields of Foreign Key Relationships</> view
in Customizing activity <DS:SIMG.FMDM_USMD001>Edit Data Model</>.

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 USMD1590 - Data model &1, foreign key relationship &2: Field assignment missing ?

  The SAP error message USMD1590 indicates that there is a missing field assignment in a foreign key relationship within a data model. This typically occurs in the context of SAP Master Data Governance (MDG) when you are trying to create or modify a data model, and it is unable to find the necessary field assignments for the specified foreign key relationship.
  Cause:
  
  Missing Field Assignment: The error usually arises when a field that is supposed to be linked through a foreign key relationship is not properly assigned in the data model.
  Incorrect Configuration: There may be an issue with the configuration of the data model, such as missing or incorrect definitions of the foreign key relationships.
  Data Model Changes: If changes were made to the data model (like adding or removing fields) without properly updating the foreign key relationships, this error can occur.
  Inconsistent Data: If the data being processed does not conform to the expected structure defined in the data model, it can lead to this error.
  
  Solution:
  
  
  Check Data Model Configuration:
  
  Go to the data model configuration in SAP MDG and verify that all foreign key relationships are correctly defined.
  Ensure that the fields involved in the foreign key relationship are properly assigned.
  
  
  
  Field Assignment:
  
  Navigate to the relevant data model and check the field assignments for the foreign key relationship mentioned in the error message.
  Make sure that the fields are correctly mapped and that there are no missing assignments.
  
  
  
  Adjust Foreign Key Relationships:
  
  If necessary, adjust the foreign key relationships to ensure that they point to the correct fields in the data model.
  You may need to create new field assignments if they are missing.
  
  
  
  Testing:
  
  After making the necessary adjustments, test the data model to ensure that the error no longer occurs.
  Validate the data being processed to ensure it meets the requirements of the data model.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for specific guidance on configuring data models and foreign key relationships in MDG.
  
  
  
  Seek Support:
  
  If the issue persists, consider reaching out to SAP support or consulting with an SAP expert who can provide more tailored assistance based on your specific configuration and setup.
  
  
  
  Related Information:
  
  SAP MDG Documentation: Review the official SAP documentation for Master Data Governance to understand the concepts of data models, field assignments, and foreign key relationships.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MDGIMG for configuration and MDG_MDS for managing master data.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to identify and resolve the cause of the USMD1590 error in your SAP environment.