How To Fix F5271 - The reverse key & for the posting key & is invalid

F5271 - Overview

• Message type: E = Error

• Message class: F5 - Document Editing

• Message number: 271

• Message text: The reverse key & for the posting key & is invalid

What causes this issue?

The reverse posting key is not allowed for one of the following
reasons:
account type deviates from the account type of the posting key
the reverse posting key for special sales is there, the posting key,
however, is not (or vice versa)
the reverse posting key has the same debits/credits indicator has
posting keys

How to fix this error?

Specify another reverse posting key for the posting key.

Error message extract from SAP system. Copyright SAP SE.

F5271 - Details

• The SAP error message F5271, which states "The reverse key & for the posting key & is invalid," typically occurs during the reversal of a financial document. This error indicates that the system is unable to find a valid reverse key for the specified posting key, which is necessary for processing the reversal.
  Causes:
  
  Invalid Posting Key: The posting key specified in the reversal process may not be configured correctly or may not exist in the system.
  Missing Reverse Key Configuration: The reverse key for the specified posting key may not be defined in the system. Each posting key should have a corresponding reverse key for reversal transactions.
  Document Type Issues: The document type associated with the transaction may not allow reversals or may not have the necessary configurations.
  Authorization Issues: The user may not have the necessary authorizations to perform the reversal for the specified posting key.
  
  Solutions:
  
  
  Check Posting Key Configuration:
  
  Go to the transaction code