How To Fix /IWFND/CM_MGW_RT128 - Inheritance for entity '&1' already exists

/IWFND/CM_MGW_RT128 - Overview

• Message type: E = Error

• Message class: /IWFND/CM_MGW_RT -

• Message number: 128

• Message text: Inheritance for entity '&1' already exists

Self-Explanatory Message

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/IWFND/CM_MGW_RT128 - Details

• The SAP error message /IWFND/CM_MGW_RT128 indicates that there is an issue with the inheritance of an entity in the OData service. Specifically, it means that the inheritance for the specified entity already exists, which can occur in various scenarios when working with OData services in SAP Gateway.
  
  Cause:
  
  
  Duplicate Inheritance Definition: The error typically arises when there is an attempt to define an inheritance relationship for an entity that has already been defined. This can happen if:
  
  The entity is already part of another inheritance hierarchy.
  There are multiple definitions or attempts to redefine the same inheritance in the service.
  
  
  
  Model Changes: If the data model has been modified (e.g., adding or changing inheritance relationships) without properly updating the service or regenerating the metadata, it can lead to inconsistencies.
  
  
  Service Registration Issues: Sometimes, issues with the service registration or activation can lead to this error, especially if the service was not properly activated after changes.
  
  
  
  Solution:
  
  
  Check Entity