How To Fix /IWFND/CM_MGW069 - POST not supported across navigation properties for composition services

/IWFND/CM_MGW069 - Overview

• Message type: E = Error

• Message class: /IWFND/CM_MGW -

• Message number: 069

• Message text: POST not supported across navigation properties for composition services

Self-Explanatory Message

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/IWFND/CM_MGW069 - Details

• The SAP error message /IWFND/CM_MGW069 POST not supported across navigation properties for composition services typically occurs in the context of OData services when you are trying to perform a POST operation on a navigation property that is not supported for composition services. This error is related to the way OData handles relationships between entities, particularly in the context of creating or updating data.
  
  Cause:
  
  
  Navigation Property Misuse: The error arises when you attempt to create or update an entity through a navigation property that is not designed to support POST operations. In OData, navigation properties represent relationships between entities, and not all relationships allow for direct creation or modification of related entities.
  
  
  Composition vs. Aggregation: In OData, composition implies a strong relationship where the child entity's lifecycle is tied to the parent entity. If the navigation property is defined as an aggregation (where the child can exist independently of the parent), then POST