How To Fix EM223 - Document number &1 can only be referred to once per migration object

SAP Error Message - Details

• Message type: E = Error

• Message class: EM - IS-U Migration

• Message number: 223

• Message text: Document number &1 can only be referred to once per migration object

Self-Explanatory Message

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• What is the cause and solution for SAP error message EM223 - Document number &1 can only be referred to once per migration object ?

  The SAP error message EM223, which states "Document number &1 can only be referred to once per migration object," typically occurs during data migration processes, particularly when using tools like the SAP Migration Cockpit or LSMW (Legacy System Migration Workbench). This error indicates that the system has detected a duplicate reference to a document number that is supposed to be unique within the context of the migration object.
  Cause:
  
  Duplicate Document Numbers: The most common cause of this error is that the same document number is being referenced multiple times in the migration data. Each document number should be unique for the specific migration object being processed.
  Incorrect Mapping: There may be an issue with how the data is mapped or structured in the migration file, leading to unintentional duplicates.
  Data Preparation Issues: The source data may have duplicates that were not cleaned up before the migration process.
  
  Solution:
  
  Check for Duplicates: Review the migration data file to identify any duplicate document numbers. You can use spreadsheet functions or database queries to find duplicates.
  Remove or Consolidate Duplicates: Depending on the business requirements, either remove the duplicate entries or consolidate them into a single entry if applicable.
  Validate Data Mapping: Ensure that the mapping of fields in the migration object is correct and that no unintended duplicates are being created during the mapping process.
  Re-run the Migration: After addressing the duplicates, re-run the migration process to see if the error persists.
  
  Related Information:
  
  Migration Objects: Understand the specific migration object you are working with, as different objects may have different rules regarding uniqueness.
  SAP Documentation: Refer to SAP's official documentation for the migration tool you are using, as it may provide additional insights or guidelines on handling unique constraints.
  Error Logs: Check the error logs or detailed messages provided by the migration tool for more context on where the duplicates are occurring.
  Testing: Before performing a full migration, consider running a test migration with a smaller dataset to identify potential issues early.
  
  By following these steps, you should be able to resolve the EM223 error and successfully complete your data migration.