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

SAP Error Message - Details

• 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.