How To Fix AU027 - You cannot specify an asset subnumber with internal number assignment

AU027 - Overview

• Message type: E = Error

• Message class: AU - FI-AA utility program error messages

• Message number: 027

• Message text: You cannot specify an asset subnumber with internal number assignment

What causes this issue?

You want to create a master record for an asset sub-number and have
specified a sub-number. However, internal sub-number allocation has
been set for this asset class.

System Response

The system cannot create a sub-number master record with the sub-number
you specified.

How to fix this error?

Do not specify a sub-number. The system will create a master record
with an automatically allocated sub-number.

Error message extract from SAP system. Copyright SAP SE.

AU027 - Details

• The SAP error message AU027 ("You cannot specify an asset subnumber with internal number assignment") typically occurs when you are trying to create or modify an asset in the Asset Accounting (FI-AA) module, and you are attempting to assign a subnumber to an asset that is set up to use internal number assignment.
  
  Cause:
  The error arises because:
  
  The asset is configured to use internal number assignment, which means that the system automatically generates the asset number and subnumber.
  When internal number assignment is used, you cannot manually specify a subnumber for the asset.
  
  
  Solution:
  To resolve this error, you have a couple of options:
  
  
  Remove the Subnumber: If you are trying to create or modify an asset, simply do not specify a subnumber. Let the system handle the assignment automatically.
  
  
  Change Number Assignment Method: If you need to use subnumbers for your assets, you can change the asset's configuration to use external number assignment. This can be