How To Fix CFD_REGISTRY_CHECK020 - Dummy field name must differ in Persistence and Transient Fields Include

SAP Error Message - Details

• Message type: E = Error

• Message class: CFD_REGISTRY_CHECK - Custom Fields: Messages for Registry Check

• Message number: 020

• Message text: Dummy field name must differ in Persistence and Transient Fields Include

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CFD_REGISTRY_CHECK020 - Dummy field name must differ in Persistence and Transient Fields Include ?

  The SAP error message CFD_REGISTRY_CHECK020 indicates that there is a mismatch between the field names defined in the persistence layer and the transient layer of your data model. Specifically, it suggests that a dummy field name is being used in both layers, which is not allowed.
  Cause:
  This error typically arises when:
  
  A field is defined with the same name in both the persistence (database) and transient (in-memory) layers of your data model.
  The field is intended to be a dummy field (a placeholder or temporary field) but does not have unique identifiers in both layers.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Field Definitions:
  
  Review the definitions of your fields in both the persistence and transient layers.
  Ensure that dummy fields have unique names in both layers. For example, if you have a dummy field named DUMMY_FIELD in the persistence layer, you should rename it in the transient layer to something like DUMMY_FIELD_TRANSIENT.
  
  
  
  Modify the Data Model:
  
  If you are using a data model definition tool (like ABAP CDS views or similar), go to the relevant data model and change the field names accordingly.
  Ensure that the naming conventions are followed and that dummy fields are clearly distinguished from actual data fields.
  
  
  
  Re-activate the Data Model:
  
  After making the necessary changes, re-activate the data model to ensure that the changes take effect.
  
  
  
  Test the Changes:
  
  Execute the relevant transactions or reports to verify that the error has been resolved and that the data model behaves as expected.
  
  
  
  Related Information:
  
  Dummy Fields: These are often used for temporary calculations or placeholders in data models. They should not conflict with actual data fields.
  Persistence vs. Transient: Persistence fields are stored in the database, while transient fields exist only in memory during the execution of a program or transaction.
  SAP Documentation: Refer to the official SAP documentation for guidelines on naming conventions and data model design best practices.
  
  If the issue persists after following these steps, consider reaching out to your SAP support team or consulting the SAP community for further assistance.