How To Fix CNV_40300017 - Mapping values result in temporary duplicates

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_40300 - Message class for package 40300 (ANLKL)

• Message number: 017

• Message text: Mapping values result in temporary duplicates

What causes this issue?

Asset class &V1& is to be renamed to asset class &V2&. Asset class &V2&
exists in the system, and will be renamed to &V3&. This will cause
<DS:TX.CNV_MBT_TEMP_DUPLICATES>temporary duplicates</>.

System Response

How to fix this error?

Check your mapping table for correctness.
If the mapping is correct, be aware that the conversion runtime might be
longer.
Otherwise correct the mapping values.
If the runtime is critical, we recommend to avoid temporary duplicates
and change the mapping values.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_40300017 - Mapping values result in temporary duplicates ?

  The SAP error message CNV_40300017 indicates that during a data migration or conversion process, the mapping of values has resulted in temporary duplicates. This typically occurs in scenarios where data is being transformed or migrated from one system to another, and the mapping logic does not ensure uniqueness for certain fields.
  Cause:
  
  Duplicate Values in Source Data: The source data may contain duplicate entries that are not being handled correctly during the mapping process.
  Mapping Logic Issues: The mapping rules defined in the conversion process may not account for uniqueness, leading to the creation of duplicate records in the target system.
  Configuration Errors: Incorrect configuration settings in the migration tool or process can lead to unintended duplicates.
  Data Transformation Errors: Errors in the transformation logic that do not properly differentiate between records can also lead to duplicates.
  
  Solution:
  
  Review Source Data: Check the source data for duplicates. If duplicates exist, you may need to clean the data before migration.
  Adjust Mapping Rules: Modify the mapping rules to ensure that they enforce uniqueness. This may involve adding additional criteria to the mapping logic.
  Use Unique Identifiers: Ensure that the mapping process uses unique identifiers (like primary keys) to differentiate records.
  Data Validation: Implement validation checks in the migration process to catch duplicates before they are committed to the target system.
  Consult Documentation: Refer to SAP documentation or the specific migration tool documentation for guidelines on handling duplicates.
  Testing: Conduct thorough testing of the migration process with a subset of data to identify and resolve any issues before performing a full migration.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on data migration best practices.
  Migration Tools: Familiarize yourself with the specific SAP migration tools being used (e.g., SAP S/4HANA Migration Cockpit, SAP Data Services) and their capabilities regarding data mapping and transformation.
  Community Forums: Engage with SAP community forums or support channels for insights from other users who may have encountered similar issues.
  
  By addressing the root causes and implementing the suggested solutions, you should be able to resolve the CNV_40300017 error and successfully complete your data migration process.