How To Fix /CFG/CO_MSG021 - Data query on non key field &1 is not supported

/CFG/CO_MSG021 - Overview

• Message type: E = Error

• Message class: /CFG/CO_MSG -

• Message number: 021

• Message text: Data query on non key field &1 is not supported

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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/CFG/CO_MSG021 - Details

• The SAP error message /CFG/CO_MSG021 indicates that a data query is being attempted on a non-key field in a configuration context, which is not supported. This typically occurs in the context of SAP's configuration management or when working with certain data queries in the system.
  
  Cause:
  The error is triggered when a query is executed on a field that is not defined as a key field in the relevant database table or data structure. In SAP, key fields are essential for uniquely identifying records, and queries on non-key fields may not be supported due to performance or data integrity reasons.
  
  Solution:
  To resolve this error, consider the following steps:
  
  
  Check the Query Definition: Review the query that is being executed. Ensure that it is only using key fields for filtering or selection criteria. If non-key fields are being used, modify the query to use key fields instead.
  
  
  Modify the Data Model: If you need to query