How To Fix J3054 - External transaction number '&' not unique. Processing not possible

J3054 - Overview

• Message type: E = Error

• Message class: J3 - Dialog Messages for Data Pool Entry Transactions

• Message number: 054

• Message text: External transaction number '&' not unique. Processing not possible

What causes this issue?

The system is unable to uniquely identify the transaction with external
transaction number '&V1&'.

System Response

No further processing possible.

How to fix this error?

Enter the external transaction number in online transaction master
maintenance, and select the transaction via the internal transaction
number.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message J3054 - External transaction number '&' not unique. Processing not possible ?

  The SAP error message J3054, which states "External transaction number '&' not unique. Processing not possible," typically occurs in the context of financial transactions, particularly when dealing with external transaction numbers in the SAP system. This error indicates that the external transaction number you are trying to process is not unique within the system, which prevents the transaction from being processed.
  
  Cause:
  
  
  Duplicate External Transaction Numbers: The most common cause of this error is that the external transaction number you are trying to use has already been assigned to another transaction in the system. This can happen if:
  
  The same transaction number is being used for multiple entries.
  There is a data entry error where the same number is mistakenly entered multiple times.
  There are issues with data imports or integrations that lead to duplicate entries.
  
  
  
  
  Configuration Issues: In some cases, the configuration settings for handling external transaction numbers may not be set up correctly, leading