How To Fix HRNQFZA021 - &1 id is already being used in table &2 in client &3

HRNQFZA021 - Overview

• Message type: E = Error

• Message class: HRNQFZA - NQF messages

• Message number: 021

• Message text: &1 id is already being used in table &2 in client &3

What causes this issue?

You have tried to customise all required tables for NQF. In client
&3 the entry &1 already exists in table &2.

System Response

It is important that the customising for NQF is consisitent across all
systems and clients. To ensure this the program gives an error when
the specific NQF customising value is already being used.
In the event that &1 entry is already NQF specific check view
cluster VC_T5W8H. An entry NQF with &1 must first exit here.

How to fix this error?

1) You can either delete this entry and all dependent entries from
table &2 in client &3 and therefore making it available
for NQF.
or
2) If the first option is not possible. Copy this program to a customer
program and change the required value of &3 to another value
that you are not using. Use your new program for all future NQF setups.

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.

HRNQFZA021 - Details

• The SAP error message HRNQFZA021 indicates that a specific ID (usually a personnel number, employee ID, or similar identifier) is already in use in a particular table within a specified client. This error typically arises in the context of HR (Human Resources) or related modules when there is an attempt to create or modify a record that conflicts with an existing entry.
  
  Cause:
  
  Duplicate Entry: The ID you are trying to use is already assigned to another record in the specified table.
  Data Migration Issues: If data has been migrated from another system, there may be conflicts with existing IDs.
  Incorrect Configuration: There may be issues with the configuration of the system that allows for duplicate IDs.
  User Error: The user may be attempting to create a record with an ID that they mistakenly believe is available.
  
  
  Solution:
  
  
  Check Existing Records: 
  
  Use transaction codes like SE16 or SE11 to check the contents of the table mentioned in