How To Fix /SAPDMC/LSMW_AUX_030001 - Entry '&' already exists.

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPDMC/LSMW_AUX_030 -

• Message number: 001

• Message text: Entry '&' already exists.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPDMC/LSMW_AUX_030001 - Entry '&' already exists. ?

  The SAP error message /SAPDMC/LSMW_AUX_030001 Entry '&' already exists. typically occurs in the context of using the Legacy System Migration Workbench (LSMW) in SAP. This error indicates that there is an attempt to create an entry (such as a record or a key) that already exists in the target system or in the context of the LSMW project.
  Cause:
  
  Duplicate Entries: The most common cause of this error is that the entry you are trying to create already exists in the target database. This could be due to previous imports or data already being present in the system.
  Incorrect Mapping: If the mapping of fields in the LSMW project is not set up correctly, it may lead to attempts to create duplicate entries.
  Data Preparation Issues: The source data being imported may contain duplicates or may not have been cleaned properly before the import process.
  
  Solution:
  
  Check for Existing Entries: Before running the LSMW process, check the target table or database to see if the entry already exists. You can do this by querying the database or using transaction codes like SE16 or SE11.
  Modify Source Data: If duplicates are found in the source data, clean the data to remove duplicates or adjust the data to ensure that only unique entries are being imported.
  Adjust LSMW Settings: Review the LSMW project settings and mappings to ensure that they are correctly configured to avoid creating duplicates. This may involve changing the key fields or adjusting the import logic.
  Use Update Mode: If the intention is to update existing records rather than create new ones, ensure that the LSMW project is set to use the update mode instead of the create mode.
  Error Handling: Implement error handling in your LSMW project to manage duplicates gracefully, such as skipping existing entries or logging them for review.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes like LSMW, SE16, and SE11 for data management and analysis.
  Documentation: Review SAP documentation on LSMW for best practices in data migration and handling duplicates.
  SAP Notes: Check SAP Notes for any specific patches or updates related to LSMW and this error message, as there may be known issues or fixes available.
  
  By following these steps, you should be able to resolve the error and successfully complete your data migration using LSMW.