How To Fix CX270 - At least two lines in the table contain the same values

SAP Error Message - Details

• Message type: E = Error

• Message class: CX - Nachrichten für Konfigurationsprozess

• Message number: 270

• Message text: At least two lines in the table contain the same values

What causes this issue?

You want the system to display this table in the form of a decision
table. This is only possible if each value combination is represented
by one table line only.

System Response

The system found a value combination which is represented by two
table lines. Therefore it is not possible to set up a decision table.

How to fix this error?

Delete all table lines with identical value combinations.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CX270 - At least two lines in the table contain the same values ?

  The SAP error message CX270, which states "At least two lines in the table contain the same values," typically occurs when there is an attempt to insert or update data in a table where a unique constraint is violated. This means that the system has detected duplicate entries that are not allowed based on the table's defined constraints.
  Cause:
  
  Duplicate Entries: The most common cause is that the data being processed contains duplicate entries that violate the unique key constraints of the table.
  Data Input Errors: Errors in data entry or data import processes can lead to duplicates being created unintentionally.
  Incorrect Logic in Custom Code: If there is custom ABAP code or enhancements that manipulate data, it may inadvertently create duplicates.
  Data Migration Issues: During data migration or upload processes, if the source data contains duplicates, they may be transferred to the target table.
  
  Solution:
  
  
  Identify Duplicates: 
  
  Use SQL queries or transaction codes (like SE16 or SE11) to check the table for existing duplicate entries. 
  Identify the fields that are supposed to be unique and check for duplicates in those fields.
  
  
  
  Data Cleansing:
  
  Remove or correct the duplicate entries in the source data before attempting to insert or update the table again.
  If duplicates are found in the database, you may need to delete or merge them based on business rules.
  
  
  
  Review Custom Code:
  
  If the error is occurring due to custom ABAP code, review the logic to ensure it correctly handles unique constraints.
  Implement checks in the code to prevent duplicates from being created.
  
  
  
  Adjust Data Import Processes:
  
  If the error arises during data import, ensure that the import process includes checks for duplicates before attempting to insert data into the table.
  
  
  
  Consult Documentation:
  
  Review the documentation for the specific table to understand its unique constraints and ensure that your data adheres to these rules.
  
  
  
  Related Information:
  
  Transaction Codes: Use transaction codes like SE11 (Data Dictionary), SE16 (Data Browser), or SE80 (Object Navigator) to analyze the table structure and data.
  Unique Constraints: Understand the unique constraints defined on the table by checking the table definition in the Data Dictionary (SE11).
  Error Handling: Implement error handling in your processes to catch and log such errors for easier troubleshooting in the future.
  
  By following these steps, you should be able to resolve the CX270 error and prevent it from occurring in the future.