How To Fix ESH_OM_OBJ_MODEL_RP2321 - Cardinality "&3" does not fit to foreign key definitions

SAP Error Message - Details

• Message type: E = Error

• Message class: ESH_OM_OBJ_MODEL_RP2 - Object Model Repository (2)

• Message number: 321

• Message text: Cardinality "&3" does not fit to foreign key definitions

What causes this issue?

All key fields of node &v2& of object type &v1& are specified in the
foreign key definition of the composition. In this case only a
cardinality "Exactly one" or "Up to one" makes sense.

System Response

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

How to fix this error?

In the modeler for search and analytics adjust the cardinality or the
foreign key definition.
When importing data adjust the target cardinality or the foreign key
definition.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message ESH_OM_OBJ_MODEL_RP2321 - Cardinality "&3" does not fit to foreign key definitions ?

  The SAP error message ESH_OM_OBJ_MODEL_RP2321 indicates a problem with the cardinality of a relationship in the object model, specifically related to foreign key definitions. This error typically arises in the context of the SAP Enterprise Search (SAP ESH) or when working with the Object Model in SAP.
  Cause:
  The error message suggests that there is a mismatch between the cardinality defined in the object model and the foreign key constraints in the database. Cardinality refers to the number of instances of one entity that can or must be associated with each instance of another entity. The error message indicates that the cardinality defined (represented by "&3") does not align with what is expected based on the foreign key definitions.
  Possible Causes:
  
  Incorrect Cardinality Definition: The cardinality defined in the object model may not match the actual relationships defined in the database schema.
  Database Schema Changes: If there have been recent changes to the database schema (e.g., changes in foreign key constraints), the object model may not have been updated accordingly.
  Configuration Errors: There may be configuration errors in the object model setup that lead to this mismatch.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Review Object Model Configuration:
  
  Check the object model configuration in the SAP system to ensure that the cardinality settings are correct and align with the foreign key definitions in the database.
  
  
  
  Check Foreign Key Definitions:
  
  Review the foreign key constraints in the database to understand the expected cardinality. Ensure that the object model reflects these constraints accurately.
  
  
  
  Update Object Model:
  
  If there are discrepancies, update the object model to match the foreign key definitions. This may involve changing the cardinality settings in the object model.
  
  
  
  Rebuild or Refresh the Object Model:
  
  In some cases, it may be necessary to rebuild or refresh the object model to ensure that all definitions are up to date.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or notes related to the specific version of SAP you are using for any known issues or additional guidance.
  
  
  
  Testing:
  
  After making changes, test the object model to ensure that the error no longer occurs and that the relationships function as expected.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  System Logs: Review system logs for any additional error messages or warnings that may provide more context about the issue.
  
  By following these steps, you should be able to identify and resolve the cause of the ESH_OM_OBJ_MODEL_RP2321 error in your SAP system.