How To Fix CNV_21527012 - Multiple lines with old logical system &1

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_21527 - Logical System Rename

• Message number: 012

• Message text: Multiple lines with old logical system &1

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_21527012 - Multiple lines with old logical system &1 ?

  The SAP error message CNV_21527012, which indicates "Multiple lines with old logical system &1," typically arises during data migration or conversion processes, particularly when using SAP's data migration tools. This error suggests that there are multiple entries in the source data that reference the same old logical system, which can lead to conflicts or inconsistencies during the migration process.
  Cause:
  
  Duplicate Entries: The primary cause of this error is the presence of duplicate entries in the source data that are associated with the same old logical system. This can happen if the data extraction process did not filter out duplicates or if the source system itself contains redundant records.
  Data Integrity Issues: There may be issues with data integrity in the source system, leading to multiple records being created for the same logical system.
  Incorrect Mapping: The mapping configuration in the migration tool may not be set up correctly, causing the system to misinterpret the data.
  
  Solution:
  
  Identify Duplicates: Review the source data for duplicates associated with the old logical system. You can use SQL queries or data analysis tools to identify these duplicates.
  Data Cleansing: Cleanse the data by removing or consolidating duplicate entries. Ensure that each logical system has a unique entry in the dataset.
  Adjust Mapping: If the issue is related to mapping, review and adjust the mapping configuration in the migration tool to ensure it correctly handles the data.
  Test Migration: After making the necessary adjustments, perform a test migration to verify that the error has been resolved and that the data is being processed correctly.
  Consult Documentation: Refer to SAP documentation or notes related to the specific migration tool you are using for any additional guidance or best practices.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional insights or solutions related to this error message.
  Migration Tools: Familiarize yourself with the specific migration tool you are using (e.g., SAP S/4HANA Migration Cockpit, SAP Data Services) as they may have specific features or settings that can help mitigate this issue.
  Data Governance: Implement data governance practices to ensure data quality and integrity in the source systems to prevent similar issues in future migrations.
  
  If the problem persists after following these steps, consider reaching out to SAP support for further assistance.