How To Fix CNV20400011 - Temporary duplicates may occur during the conversion

CNV20400011 - Overview

• Message type: E = Error

• Message class: CNV20400 - Message class CNV20400

• Message number: 011

• Message text: Temporary duplicates may occur during the conversion

What causes this issue?

The mapping values may result in
<DS:TX.CNV_MBT_TEMP_DUPLICATES>temporary duplicates</>.
Entries of type A -> B and B -> C were found during the analysis. If
during the conversion A is renamed into B before B has been renamed into
C, object B exists twice in the database for a certain period of time
(temporary duplicate), which is not allowed. To avoid this problem, a
special conversion method (with dummy client) must be used. Application
of this method is controlled by the KEYCHVIEWS indicator in table
CNVTABLES. In the given case, the indicator must not be set.

System Response

The program checks if the KEYCHVIEWS indicator is set in table
CNVTABLES, and removes it if it is set.

How to fix this error?

If you add more tables in CNVTABLES, make sure that the KEYCHVIEWS
indicator is not set.

Error message extract from SAP system. Copyright SAP SE.

CNV20400011 - Details

• The SAP error message CNV20400011 indicates that temporary duplicates may occur during a data conversion process, typically in the context of SAP's data migration tools, such as the SAP S/4HANA Migration Cockpit or other data conversion scenarios. This message is part of the SAP Conversion and Migration framework, which is used to facilitate the transition from legacy systems to SAP S/4HANA or other SAP solutions.
  
  Cause:
  The error message suggests that during the conversion process, the system has detected potential duplicate entries that could arise due to the way data is being transformed or migrated. This can happen for several reasons, including:
  
  Data Structure Changes: Changes in the data model between the source and target systems may lead to duplicates if the same data is represented differently.
  Data Quality Issues: The source data may contain duplicates that are not resolved before the migration.
  Mapping Issues: Incorrect mapping of fields from the source to the target