How To Fix CNV_DMC_SIN458 - Mapping value &1 of Project ID &2 is not unique.

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 458

• Message text: Mapping value &1 of Project ID &2 is not unique.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_DMC_SIN458 - Mapping value &1 of Project ID &2 is not unique. ?

  The SAP error message CNV_DMC_SIN458 indicates that there is a mapping issue in the Data Migration Cockpit (DMC) where a specific value for a Project ID is not unique. This typically occurs during data migration processes when the system expects a unique mapping for a particular field, but it finds duplicate entries.
  Cause:
  
  Duplicate Entries: The most common cause of this error is that there are multiple entries in the mapping table for the same Project ID with the same value. This can happen if the data was not cleaned or validated before migration.
  Incorrect Mapping Configuration: The mapping configuration may not have been set up correctly, leading to conflicts in the values assigned to the Project ID.
  Data Integrity Issues: There may be underlying data integrity issues in the source system that result in non-unique values being mapped.
  
  Solution:
  
  Identify Duplicates: Check the mapping table for the Project ID mentioned in the error message. Look for duplicate entries for the value indicated by &1.
  Remove or Correct Duplicates: 
  
  If duplicates are found, determine which entries are valid and remove or correct the duplicates to ensure that each Project ID has a unique mapping value.
  You may need to consult with stakeholders to decide which data to keep or how to resolve conflicts.
  
  
  Review Mapping Configuration: Ensure that the mapping configuration is set up correctly and that it adheres to the requirements of the migration process.
  Data Validation: Before running the migration again, validate the data to ensure that there are no other potential issues that could cause similar errors.
  Test Migration: After making the necessary corrections, perform a test migration to confirm that the issue has been resolved.
  
  Related Information:
  
  Data Migration Cockpit (DMC): This is a tool used in SAP for migrating data from legacy systems to SAP systems. It provides functionalities for mapping, transforming, and validating data.
  Mapping Tables: These tables are crucial in the migration process as they define how data from the source system corresponds to the target system.
  Error Logs: Check the error logs for additional context or related errors that may provide further insight into the issue.
  SAP Notes: Look for relevant SAP Notes or documentation that may provide additional guidance or updates related to this error message.
  
  If the issue persists after following these steps, consider reaching out to SAP support or consulting with a data migration expert for further assistance.