How To Fix COM_IL017 - Relationship cannot be changed; the target object is a key field

COM_IL017 - Overview

• Message type: E = Error

• Message class: COM_IL - Object Relationships (Interlinkages)

• Message number: 017

• Message text: Relationship cannot be changed; the target object is a key field

Self-Explanatory Message

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COM_IL017 - Details

• The SAP error message COM_IL017 indicates that there is an attempt to change a relationship in a way that is not allowed because the target object is a key field. This typically occurs in the context of SAP's Integrated Logistics (IL) or in the context of master data management, where certain relationships between objects (like materials, BOMs, or other master data) are defined based on key fields.
  
  Cause:
  
  Key Field Restriction: The target object you are trying to modify is a key field, which means it is essential for the identification of the object. Key fields are usually not allowed to be changed or modified in certain relationships to maintain data integrity.
  Data Integrity Rules: SAP enforces strict data integrity rules to ensure that relationships between objects remain consistent. Changing a relationship involving key fields can lead to inconsistencies in the data model.
  Incorrect Configuration: The error may also arise from incorrect configuration or