How To Fix PPE_MESSAGE023 - External reference &1 is not unique for the item. Key &2

PPE_MESSAGE023 - Overview

• Message type: E = Error

• Message class: PPE_MESSAGE - Messages for PPE

• Message number: 023

• Message text: External reference &1 is not unique for the item. Key &2

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message PPE_MESSAGE023 - External reference &1 is not unique for the item. Key &2 ?

  The SAP error message PPE_MESSAGE023 indicates that there is a problem with the external reference for a specific item in the system. This error typically arises in the context of SAP Advanced Planning and Optimization (APO) or SAP Integrated Business Planning (IBP) when the system encounters a situation where the external reference provided is not unique for the specified item.
  
  Cause:
  The error occurs when:
  
  Duplicate External References: The external reference (e.g., a unique identifier for a product or item) is not unique within the context of the item specified by the key. This means that there are multiple entries in the database that share the same external reference for the same item.
  Data Integrity Issues: There may be issues with data integrity, such as incorrect data entry or synchronization problems between systems.
  
  Configuration Issues: The system may not be configured correctly to handle external references, leading to conflicts.
  
  
  Solution:
  To resolve this error, you can take