How To Fix AA991 - Ch.of dep.-depend. data from ch.of dep. &1 in asset class &2 was unlocked

AA991 - Overview

• Message type: E = Error

• Message class: AA - Messages for Asset Accounting

• Message number: 991

• Message text: Ch.of dep.-depend. data from ch.of dep. &1 in asset class &2 was unlocked

Self-Explanatory Message

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To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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AA991 - Details

• The SAP error message AA991 indicates that there is an issue with the change of depreciation data for an asset in a specific asset class. This error typically arises when there is an inconsistency or conflict in the asset's depreciation data, particularly when trying to unlock or modify the data.
  
  Cause:
  
  Inconsistent Data: The error often occurs when there are inconsistencies in the depreciation data for the asset. This can happen if the asset has been modified in a way that conflicts with existing data.
  Locked Data: The depreciation data may be locked due to previous transactions or settings that prevent changes from being made.
  Asset Class Configuration: There may be issues with the configuration of the asset class itself, which can lead to problems when trying to change depreciation data.
  
  
  Solution:
  
  Check Asset Data: Review the asset master data and ensure that all required fields are correctly filled out and consistent. Look for any discrepancies