How To Fix CNV_NCE_BAS203 - Number &1: target number is changed from &2 to &3

CNV_NCE_BAS203 - Overview

• Message type: E = Error

• Message class: CNV_NCE_BAS - Number conversion engine: messages

• Message number: 203

• Message text: Number &1: target number is changed from &2 to &3

What causes this issue?

The program had to adjust an automatically generated one-to-one mapping
&V1& -> &V2&.

System Response

The system generates one-to-one mapping values to resolve a problem of
duplicate numbers. It maps one of the duplicate numbers to the first
free number in the target number range interval. Since new numbers are
constantly created in the productive system, it is possible that a
previously used target number is no longer available. In this case, the
system has to adjust the mapping and choose the first free number in the
target number range interval again.

How to fix this error?

Check the generated mapping values. You can correct it and select
another target number. Note, that in this case the system will not do
any automatic adjustments anymore.

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_BAS203 - Details

• The SAP error message CNV_NCE_BAS203 typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or other data migration tools. This error indicates that a target number (such as a key or identifier) has changed unexpectedly during the migration process.
  
  Cause:
  The error message CNV_NCE_BAS203 is triggered when:
  
  The target number (e.g., a unique identifier for a record) has been altered from its original value to a new value during the migration process.
  This can happen due to various reasons, such as:
  Data mapping issues where the source and target systems have different configurations or structures.
  Duplicate records in the source data that lead to conflicts in the target system.
  Changes in the data transformation rules that result in different target values than expected.
  
  
  
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Review the Migration Mapping:
  
  Check the mapping configuration between the source and target systems to ensure that the data is