How To Fix DMCLG053 - Relation cannot be inserted twice

SAP Error Message - Details

• Message type: E = Error

• Message class: DMCLG - DMC Tool Development

• Message number: 053

• Message text: Relation cannot be inserted twice

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

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Smart SAP Assistant

• What is the cause and solution for SAP error message DMCLG053 - Relation cannot be inserted twice ?

  The SAP error message DMCLG053, which states "Relation cannot be inserted twice," typically occurs in the context of data management or master data maintenance within SAP systems. This error indicates that there is an attempt to insert a relationship or link that already exists in the system, which violates the uniqueness constraint for that particular relationship.
  Cause:
  
  Duplicate Entry: The most common cause of this error is that the system is trying to create a relationship (e.g., between a customer and a vendor, or between different master data records) that already exists in the database.
  Data Migration Issues: If data is being migrated from another system or if bulk uploads are being performed, there may be duplicate records being introduced.
  Incorrect Logic in Custom Code: If there is custom ABAP code or enhancements that manipulate relationships, there may be logic errors leading to attempts to insert duplicates.
  
  Solution:
  
  Check Existing Relationships: Before attempting to insert a new relationship, check the existing records to ensure that the relationship does not already exist. This can often be done through transaction codes relevant to the data being managed (e.g., SE16 for table checks).
  Data Cleansing: If duplicates are found, you may need to clean up the data by removing or consolidating duplicate entries.
  Review Data Migration Processes: If this error arises during data migration, review the migration logic to ensure that it correctly handles existing relationships and avoids duplicates.
  Debug Custom Code: If the error is occurring due to custom code, debug the relevant ABAP programs to identify where the duplicate insertion is being attempted and correct the logic.
  Consult Documentation: Review SAP documentation or notes related to the specific module you are working with, as there may be specific guidelines or known issues related to this error.
  
  Related Information:
  
  Transaction Codes: Depending on the context, you may use transaction codes like SE11 (Data Dictionary), SE16 (Data Browser), or SE80 (Object Navigator) to investigate the underlying data structures and relationships.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. You can search for the error message number in the SAP Support Portal.
  Community Forums: SAP Community and other forums can be helpful for finding similar issues faced by other users and the solutions they implemented.
  
  By following these steps, you should be able to identify the cause of the DMCLG053 error and implement a solution to resolve it.