How To Fix CNV_DMC_SIN261 - Storage Location Data: &1 / &2 already exists

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 261

• Message text: Storage Location Data: &1 / &2 already exists

What causes this issue?

With object 'Material - extend existing record by new org levels' you
can only extend new storage location data. You can't change already
existing entries.

System Response

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

How to fix this error?

Delete these records from the template.

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_SIN261 - Storage Location Data: &1 / &2 already exists ?

  The SAP error message CNV_DMC_SIN261 indicates that there is an attempt to create or import storage location data that already exists in the system. This error typically arises during data migration or data transfer processes, particularly when using the SAP Data Migration Cockpit or similar tools.
  Cause:
  The error occurs when:
  
  You are trying to create a storage location with a key (e.g., storage location code) that already exists in the target system.
  There may be duplicate entries in the data being imported or migrated.
  The data migration process is not correctly handling existing records, leading to conflicts.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Existing Data:
  
  Verify if the storage location with the specified key already exists in the target system. You can do this by navigating to the relevant transaction (e.g., MM03 for material master data) and checking the storage location.
  
  
  
  Remove Duplicates:
  
  If you are importing data from a file or another source, ensure that there are no duplicate entries in your data set. Clean up the data to remove any duplicates before attempting the import again.
  
  
  
  Update Existing Records:
  
  If the intention is to update existing storage location data rather than create new entries, modify your data migration approach to update the existing records instead of trying to create them.
  
  
  
  Use a Different Key:
  
  If you need to create a new storage location, consider using a different key that does not conflict with existing entries.
  
  
  
  Consult Logs:
  
  Check the logs or detailed error messages provided by the data migration tool for more context on the error. This can help identify the specific records causing the issue.
  
  
  
  Data Migration Cockpit Settings:
  
  Review the settings and configurations in the Data Migration Cockpit to ensure that it is set up correctly to handle existing records.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MM01 (Create Material), MM02 (Change Material), and MM03 (Display Material) to manage storage locations.
  SAP Notes: Check for any SAP Notes related to data migration and the specific error message for additional guidance or patches.
  Documentation: Refer to the official SAP documentation for the Data Migration Cockpit for best practices and troubleshooting tips.
  
  By following these steps, you should be able to resolve the CNV_DMC_SIN261 error and successfully manage your storage location data.