How To Fix SOS_MAPPING145 - The persistence mapping has already been defined in a superclass

SAP Error Message - Details

• Message type: E = Error

• Message class: SOS_MAPPING - Object Services: Persistence Mapping for Messages

• Message number: 145

• Message text: The persistence mapping has already been defined in a superclass

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SOS_MAPPING145 - The persistence mapping has already been defined in a superclass ?

  The SAP error message SOS_MAPPING145 indicates that there is a conflict in the persistence mapping of a class in the context of the SAP ABAP programming environment. This error typically arises when you are trying to define a mapping for a property in a subclass that has already been defined in its superclass. 
  Cause:
  
  Inheritance Conflict: The subclass is attempting to redefine a persistence mapping (like a database field mapping) that has already been defined in its superclass. In object-oriented programming, subclasses inherit properties and methods from their superclasses, and persistence mappings are also inherited.
  Duplicate Mapping: You may have inadvertently created a duplicate mapping for a property that is already mapped in the superclass.
  
  Solution:
  
  Check Superclass Mappings: Review the persistence mappings defined in the superclass. Ensure that you are not trying to redefine a mapping that already exists.
  Remove Redundant Mapping: If the property in the subclass does not need a different mapping, you can simply remove the mapping definition from the subclass.
  Override if Necessary: If you need to change the mapping for a specific reason, consider whether you can override the property in a way that adheres to the inheritance rules. This might involve changing the design of your classes.
  Use Annotations: If you are using annotations for persistence mapping, ensure that they are correctly applied and do not conflict with inherited mappings.
  Consult Documentation: Refer to the SAP documentation for the specific version you are using to understand the rules around persistence mapping and inheritance.
  
  Related Information:
  
  ABAP Class and Interface Documentation: Review the documentation for ABAP classes and interfaces to understand how inheritance and mapping work.
  SAP Community: Engage with the SAP Community forums for insights from other developers who may have encountered similar issues.
  Debugging Tools: Use debugging tools in the ABAP Workbench to trace the execution and see where the mapping conflict arises.
  
  By following these steps, you should be able to resolve the SOS_MAPPING145 error and ensure that your persistence mappings are correctly defined without conflicts.