How To Fix VMP_MSG379 - Can't perform action as reference designator already maintained in source

VMP_MSG379 - Overview

• Message type: E = Error

• Message class: VMP_MSG - VMP Message Manager

• Message number: 379

• Message text: Can't perform action as reference designator already maintained in source

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message VMP_MSG379 - Can't perform action as reference designator already maintained in source ?

  Certainly! Here's a detailed explanation for the SAP error message:
  
  SAP Error Message:
  VMP_MSG379: Can't perform action as reference designator already maintained in source
  
  
  Cause:
  This error occurs in the Variant Configuration (VC) or Engineering Change Management (ECM) context, typically when working with Bills of Materials (BOMs) or Routing in SAP.
  
  The Reference Designator (Ref Des) is a unique identifier used to link components or operations in a BOM or routing.
  The message indicates that the system is trying to perform an action (such as adding or changing a component or operation) but cannot proceed because the Reference Designator you are trying to assign is already maintained (used) in the source.
  In other words, the Ref Des must be unique within the context, and the system has detected a duplicate.
  
  
  When does it typically occur?
  
  When creating or modifying a BOM or routing for a configurable material.
  When copying or changing BOMs/routings where Ref Des values are reused or duplicated.
  During