How To Fix CNV_DMC_SIN290 - Combination of Material &1, Material Group &2, Vendor &3 must be unique

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_DMC_SIN - Messages for s-innovations migration

• Message number: 290

• Message text: Combination of Material &1, Material Group &2, Vendor &3 must be unique

What causes this issue?

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

System Response

It is not possible to have the same combination of material number,
material group, and vendor's account number on the sheet General Data.
The Legacy Number of the purchasing info record is &V4&.
Further processing of the file is cancelled due to this wrong
combination of material number, material group, and vendor's account
number. The file will only be processed when the combinations are
correct.

How to fix this error?

Aggregate these entries to a unique combination with one Legacy Number
of purchasing info record. You can add several entries to the
subordinate sheet Purchasing Organization Data with this Legacy Number.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_DMC_SIN290 - Combination of Material &1, Material Group &2, Vendor &3 must be unique ?

  The SAP error message CNV_DMC_SIN290 indicates that there is a uniqueness constraint violation in the data being processed. Specifically, it means that the combination of Material, Material Group, and Vendor must be unique in the context of the operation you are performing, typically during data migration or data conversion processes.
  Cause:
  
  Duplicate Entries: The most common cause of this error is that there are duplicate entries in the data being imported or processed. This could happen if the same material, material group, and vendor combination exists more than once in the source data.
  Data Integrity Issues: There may be issues with the integrity of the data being migrated, such as incorrect mappings or transformations that lead to duplicates.
  Configuration Issues: Sometimes, the configuration settings in the SAP system may enforce uniqueness constraints that are not being adhered to in the incoming data.
  
  Solution:
  
  Identify Duplicates: Review the data being processed to identify any duplicate combinations of Material, Material Group, and Vendor. You can use tools like Excel or SQL queries to find duplicates in your dataset.
  Data Cleansing: Once duplicates are identified, you can either remove them or consolidate them as necessary. Ensure that the remaining entries are valid and meet the business requirements.
  Adjust Data Mapping: If the duplicates are a result of incorrect data mapping or transformation rules, adjust these mappings to ensure that they produce unique combinations.
  Check Configuration: Review the configuration settings in your SAP system to ensure that they are set up correctly and that the uniqueness constraints are appropriate for your business processes.
  Testing: After making the necessary adjustments, re-run the data migration or conversion process to ensure that the error does not occur again.
  
  Related Information:
  
  Transaction Codes: You may want to use transaction codes like SE16 or SE11 to view the relevant tables and check for duplicates.
  Data Migration Tools: If you are using SAP Data Migration Cockpit or other tools, refer to their documentation for specific guidelines on handling uniqueness constraints.
  SAP Notes: Check for any relevant SAP Notes that may provide additional insights or solutions related to this error message.
  Consult Documentation: Review the documentation for the specific data migration or conversion process you are using, as it may have specific requirements regarding data uniqueness.
  
  By following these steps, you should be able to resolve the CNV_DMC_SIN290 error and ensure that your data migration or conversion process proceeds smoothly.