How To Fix AAPO158 - Reversal is not possible; duplicate internal document number

AAPO158 - Overview

• Message type: E = Error

• Message class: AAPO - Asset Accounting - Posting

• Message number: 158

• Message text: Reversal is not possible; duplicate internal document number

What causes this issue?

Due to a system error, the internal 'asset document number' was
assigned more than once. Therefore the FI document can no longer be
clearly identified.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Carry out the reversal manually, and then repost the document that was
reversed incorrectly.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AAPO158 - Reversal is not possible; duplicate internal document number ?

  The SAP error message AAPO158, which states "Reversal is not possible; duplicate internal document number," typically occurs when you attempt to reverse a document (such as an asset transaction) that has already been reversed or when there is a conflict with the internal document number assigned to the transaction.
  
  Cause:
  
  Duplicate Document Number: The internal document number for the transaction you are trying to reverse already exists in the system. This can happen if the reversal has already been processed or if there is a duplicate entry in the system.
  Transaction Already Reversed: The document you are trying to reverse may have already been reversed in a previous transaction.
  System Configuration: There may be issues with the configuration of document number ranges or settings in the asset accounting module.
  
  
  Solution:
  
  Check Existing Transactions: Verify if the document you are trying to reverse has already been reversed. You can do this by checking the asset history or