How To Fix CNV_20700052 - Duplicate target material numbers found: &1 => &2 and &3 => &4

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_20700 - Material number conversion

• Message number: 052

• Message text: Duplicate target material numbers found: &1 => &2 and &3 => &4

What causes this issue?

Two different source material numbers were mapped to the same target
material number.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Example:
A => C
D => C

System Response

This would amount to merging the two material numbers. This scenario is
<ZH>not</> supported by this package.

How to fix this error?

Correct the mapping table accordingly.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_20700052 - Duplicate target material numbers found: &1 => &2 and &3 => &4 ?

  The SAP error message CNV_20700052 indicates that there are duplicate target material numbers found during a data migration or conversion process. This typically occurs in the context of using SAP's data migration tools, such as the SAP S/4HANA Migration Cockpit or other data transfer methods.
  Cause:
  The error arises when the system detects that multiple source material numbers are being mapped to the same target material number. This can happen due to:
  
  Data Duplication: The source data may contain duplicate entries for materials that are being migrated.
  Incorrect Mapping: The mapping configuration may incorrectly point multiple source materials to the same target material.
  Data Quality Issues: Poor data quality in the source system can lead to duplicates that were not previously identified.
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Identify Duplicates:
  
  Review the source data to identify the duplicate material numbers. You can use SQL queries or data analysis tools to find duplicates in the source dataset.
  
  
  
  Check Mapping Configuration:
  
  Review the mapping configuration in the migration tool to ensure that each source material is mapped to a unique target material. Adjust the mapping if necessary.
  
  
  
  Data Cleansing:
  
  Cleanse the source data to remove duplicates or consolidate them as needed. This may involve merging materials or reassigning them to different target materials.
  
  
  
  Adjust Target Material Numbers:
  
  If the duplicates are valid and should remain separate, consider adjusting the target material numbers to ensure that each source material maps to a unique target material.
  
  
  
  Re-run the Migration:
  
  After making the necessary adjustments, re-run the migration process to see if the error persists.
  
  
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like SE16 or SE11 to view and analyze the data in the relevant tables.
  SAP Notes: Check for any relevant SAP Notes that may provide additional guidance or patches related to this error.
  Documentation: Review the documentation for the specific migration tool you are using, as it may provide insights into handling duplicate entries.
  
  By following these steps, you should be able to resolve the CNV_20700052 error and successfully complete your data migration process.