How To Fix CPF128 - Line &1 is identical to line &2. Please remove the duplicate.

SAP Error Message - Details

• Message type: E = Error

• Message class: CPF -

• Message number: 128

• Message text: Line &1 is identical to line &2. Please remove the duplicate.

Self-Explanatory Message

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To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message CPF128 - Line &1 is identical to line &2. Please remove the duplicate. ?

  The SAP error message CPF128 indicates that there is a duplicate entry in a data structure, such as a table or a list, where two lines are identical. This error typically occurs in scenarios where unique entries are expected, such as in configuration tables, master data records, or during data uploads.
  Cause:
  The error is triggered when the system detects that two lines (or records) have the same values for the fields that are supposed to be unique. This can happen due to:
  
  Manual data entry errors.
  Data import processes where the same record is being uploaded multiple times.
  Incorrectly configured data structures that allow duplicates.
  
  Solution:
  To resolve the CPF128 error, you can follow these steps:
  
  
  Identify the Duplicate Lines: 
  
  Check the error message details, which will specify the line numbers (indicated by &1 and &2) that are identical. 
  Review the data in those lines to understand what fields are causing the duplication.
  
  
  
  Remove or Modify Duplicates:
  
  If you are working with a data upload, ensure that your source data does not contain duplicates. You may need to clean your data before re-uploading.
  If the duplicates are in a configuration table or master data, you may need to delete or modify one of the duplicate entries to ensure uniqueness.
  
  
  
  Check for Unique Constraints:
  
  Review the table or data structure to understand the unique constraints that are in place. Ensure that your data adheres to these constraints.
  
  
  
  Reprocess the Data:
  
  After resolving the duplicates, reprocess the data or re-run the transaction that triggered the error.
  
  
  
  Related Information:
  
  Transaction Codes: Depending on where the error occurs, you may need to use specific transaction codes to view or edit the data (e.g., SE11 for data dictionary, SE16 for table display).
  Data Validation: Implement data validation checks in your data entry or upload processes to prevent duplicates from being created in the first place.
  SAP Notes: Check SAP Notes for any known issues or additional guidance related to CPF128, as there may be specific recommendations based on the version of SAP you are using.
  
  By following these steps, you should be able to resolve the CPF128 error and prevent it from occurring in the future.