How To Fix CNV_NCE_BAS090 - One to One Mapping not changeable

CNV_NCE_BAS090 - Overview

• Message type: E = Error

• Message class: CNV_NCE_BAS - Number conversion engine: messages

• Message number: 090

• Message text: One to One Mapping not changeable

What causes this issue?

One to One Mapping values displayed here have been transferred from
Mapping Engine maintenance. You are not allowed to change these values
here, they are changeable only in Mapping Engine maintenance.

System Response

System will not switch to change mode.

How to fix this error?

If you want to change mapping values shown here please re-execute
activity <ZK>Specify Mapping Values</>.

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.

CNV_NCE_BAS090 - Details

• The SAP error message CNV_NCE_BAS090 ("One to One Mapping not changeable") typically occurs in the context of data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error indicates that a specific mapping configuration is locked or cannot be modified due to certain constraints.
  
  Cause:
  
  Mapping Lock: The one-to-one mapping you are trying to change is locked because it has already been used in a previous step of the migration process.
  Data Integrity: The system may prevent changes to ensure data integrity and consistency during the migration process.
  Configuration Settings: Certain settings in the migration cockpit or the configuration of the migration project may restrict changes to mappings.
  
  
  Solution:
  
  Check Mapping Status: Verify the status of the mapping you are trying to change. If it has been used in a previous migration step, you may need to revert or adjust that step first.
  Review Migration Steps: Go through the migration