How To Fix 68042 - Duplicate key entries not permitted

SAP Error Message - Details

• Message type: E = Error

• Message class: 68 - Message for DARWIN Loans (continued)

• Message number: 042

• Message text: Duplicate key entries not permitted

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message 68042 - Duplicate key entries not permitted ?

  The SAP error message "68042 Duplicate key entries not permitted" typically occurs when there is an attempt to insert or update a record in a database table that violates the unique key constraint. This means that the system is trying to create a record with a key value that already exists in the table, which is not allowed due to the unique constraint defined on that key.
  Causes:
  
  Duplicate Data Entry: The most common cause is that the data being entered already exists in the database. This can happen during manual data entry or through automated processes that do not check for existing records.
  Data Migration Issues: During data migration or data uploads, if the source data contains duplicates, it can lead to this error.
  Incorrect Logic in Custom Programs: If there are custom ABAP programs or enhancements that do not properly handle existing records, they may attempt to insert duplicates.
  Concurrency Issues: In a multi-user environment, two users might try to create the same record simultaneously, leading to a conflict.
  
  Solutions:
  
  Check for Existing Records: Before inserting or updating a record, check if a record with the same key already exists in the database. This can be done using a SELECT query.
  Modify Data Entry Logic: If the error occurs during manual data entry, ensure that users are aware of existing records and provide them with a way to search for existing entries before creating new ones.
  Data Cleansing: If the error arises from data migration, ensure that the source data is cleansed to remove duplicates before the migration process.
  Error Handling in Custom Code: If the error is due to custom ABAP code, implement proper error handling and checks to prevent duplicate entries.
  Use of Transactions: If the error is due to concurrency, consider using database transactions to manage the insert/update operations more effectively.
  
  Related Information:
  
  Unique Key Constraints: Understand the unique key constraints defined on the database table. You can check the table structure in the Data Dictionary (SE11) to see which fields are part of the unique key.
  Transaction Codes: Use transaction codes like SE11 (Data Dictionary), SE16 (Data Browser), or SE80 (Object Navigator) to analyze the table and existing records.
  Debugging: If the error is coming from a custom program, use the ABAP debugger to trace the execution and identify where the duplicate entry is being attempted.
  SAP Notes: Check for any relevant SAP Notes that might address specific issues related to this error message.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to prevent it from occurring in the future.