How To Fix CNV_DMC_SIN298 - Storage Type 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: 298

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

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

Within this Migration Object you can only extend new Storage Type Data.
You can't change already existing entries.

How to fix this error?

Delete these records from the template/staging table.

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_SIN298 - Storage Type Data: &1 / &2 already exists ?

  The SAP error message CNV_DMC_SIN298 indicates that there is a conflict with storage type data during a data migration or conversion process. Specifically, the message states that a storage type with the specified identifiers already exists in the system, which prevents the operation from proceeding.
  Cause:
  The error typically arises in the following scenarios:
  
  Duplicate Entries: The storage type data you are trying to create or modify already exists in the system. This can happen if the data migration process is attempting to insert records that are already present.
  Data Consistency Issues: There may be inconsistencies in the data being migrated, such as incorrect mappings or configurations that lead to attempts to create duplicate records.
  Configuration Errors: The configuration settings in the source or target system may not align, leading to conflicts during the migration process.
  
  Solution:
  To resolve the CNV_DMC_SIN298 error, you can take the following steps:
  
  
  Check Existing Data: 
  
  Verify if the storage type data with the specified identifiers already exists in the target system. You can do this by querying the relevant database tables or using transaction codes related to storage type management (e.g., LX01, LX02).
  
  
  
  Adjust Migration Data:
  
  If duplicates are found, you may need to adjust the data being migrated. This could involve:
  
  Modifying the migration file to exclude existing records.
  Updating the identifiers in the migration data to avoid conflicts.
  
  
  
  
  
  Data Mapping Review:
  
  Review the data mapping and transformation rules to ensure that they are correctly set up and do not lead to duplicate entries.
  
  
  
  Use of Transaction Codes:
  
  Utilize transaction codes like LS01N (Create Storage Type) or LS02N (Change Storage Type) to manually check and manage storage types.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or notes related to the specific migration process you are using (e.g., SAP S/4HANA Migration Cockpit) for any additional guidance or known issues.
  
  
  
  Error Logs:
  
  Check the error logs for more detailed information about the migration process and any other related errors that may provide context for the issue.
  
  
  
  Contact SAP Support:
  
  If the issue persists and you cannot identify the cause, consider reaching out to SAP support for assistance. They may provide insights based on the specific version of SAP you are using and any known issues.
  
  
  
  Related Information:
  
  SAP Notes: Look for relevant SAP Notes that may address this specific error or provide guidance on data migration issues.
  Migration Tools: Familiarize yourself with the tools and methodologies used for data migration in SAP, such as the SAP Data Migration Cockpit or SAP Landscape Transformation (SLT).
  Best Practices: Follow best practices for data migration, including thorough testing in a development or sandbox environment before executing in production.
  
  By following these steps, you should be able to identify the cause of the CNV_DMC_SIN298 error and implement a suitable solution.