How To Fix CNV_20200_CHECK126 - Conversion of deferred tax table would lead to duplicate table keys

CNV_20200_CHECK126 - Overview

• Message type: E = Error

• Message class: CNV_20200_CHECK - Messages for check functions (company code merge)

• Message number: 126

• Message text: Conversion of deferred tax table would lead to duplicate table keys

What causes this issue?

The conversion of the deferred tax table DEFTAX_ITEM would lead to
duplicate table keys.

System Response

Error

How to fix this error?

You cannot run the transformation solution company code merge. We
recommend that you contact SAP for support by creating a ticket using
component CA-LT-CNV.
Please use Report RFUMSV25 (no update mode) before and after the
conversion to compare the results.

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_20200_CHECK126 - Details

• The SAP error message CNV_20200_CHECK126 indicates that during the conversion process, there is an issue with the deferred tax table where the conversion would result in duplicate keys. This typically occurs in the context of data migration or system conversion, particularly when moving from one version of SAP to another or when implementing new functionalities that involve tax data.
  
  Cause:
  The error is caused by the presence of duplicate entries in the deferred tax table that violate the uniqueness constraint of the table's key fields. This can happen due to:
  
  Data Quality Issues: Existing data in the source system may have duplicates that were not identified or cleaned up prior to the conversion.
  Configuration Errors: Incorrect configuration settings in the tax calculation or mapping processes can lead to the generation of duplicate keys.
  Custom Developments: Custom programs or enhancements that manipulate tax data may inadvertently create duplicates.
  
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Identify