How To Fix UAS018 - Posting level cannot be changed because data already exists

UAS018 - Overview

• Message type: E = Error

• Message class: UAS -

• Message number: 018

• Message text: Posting level cannot be changed because data already exists

What causes this issue?

You attempted to make changes to the posting levels of the data basis.
However, this is only possible as long as no data was yet posted in the
data basis. However, the current data basis already contains data.

System Response

Changes to the posting levels are not possible in this data basis.

How to fix this error?

Create a new data basis and define the desired posting levels in it
before you use the data basis in a working environment for cost
estimates.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

UAS018 - Details

• The SAP error message UAS018 ("Posting level cannot be changed because data already exists") typically occurs in the context of Asset Accounting (FI-AA) when you attempt to change the posting level of an asset that already has posted transactions. The posting level determines how transactions are recorded in the asset accounting system, and changing it after transactions have been posted can lead to inconsistencies in the data.
  
  Cause:
  The error arises because the system prevents changes to the posting level of an asset if there are already existing postings (e.g., acquisitions, retirements, transfers) associated with that asset. This is a safeguard to maintain data integrity and ensure that financial reports remain accurate.
  
  Solution:
  To resolve this error, you can consider the following approaches:
  
  
  Check Existing Transactions: Review the asset's transaction history to identify any existing postings. You can do this by using transaction codes like AS03 (Display Asset) to view the asset's details and transaction