How To Fix FRE120 - Duplicate Key Error in Table &1 Tablekey &2 &3 &4

SAP Error Message - Details

• Message type: E = Error

• Message class: FRE - F&R CON R/3 - Messages

• Message number: 120

• Message text: Duplicate Key Error in Table &1 Tablekey &2 &3 &4

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message FRE120 - Duplicate Key Error in Table &1 Tablekey &2 &3 &4 ?

  The SAP error message FRE120, which indicates a "Duplicate Key Error in Table &1 Tablekey &2 &3 &4," typically occurs when there is an attempt to insert or update a record in a database table where the key already exists. This can happen in various scenarios, such as during data uploads, batch processing, or when executing certain transactions.
  Cause:
  
  Duplicate Entries: The most common cause is that the data being processed contains duplicate entries for a key that must be unique in the specified table.
  Data Upload Issues: If you are uploading data (e.g., via LSMW, BAPIs, or other data migration tools), the source data may have duplicates.
  Concurrency Issues: Multiple processes trying to insert the same key at the same time can lead to this error.
  Incorrect Logic in Custom Code: If there is custom ABAP code that handles data insertion or updates, it may not be correctly checking for existing records before attempting to insert.
  
  Solution:
  
  Identify Duplicates: Check the data being processed for duplicates. You can use SQL queries or tools to identify duplicate records in the source data.
  Data Cleansing: Remove or consolidate duplicate records in the source data before attempting to upload or process it again.
  Modify Logic: If the error arises from custom code, ensure that the logic checks for existing records before attempting to insert new ones. Use appropriate SELECT statements to verify the existence of a record.
  Error Handling: Implement error handling in your data processing logic to gracefully manage situations where duplicates are encountered.
  Review Table Constraints: Check the table definition to understand the unique constraints and ensure that your data adheres to these constraints.
  
  Related Information:
  
  Transaction Codes: You can use transaction codes like SE11 (Data Dictionary) to view the table structure and constraints.
  Debugging: If the error occurs in a custom program, use the ABAP debugger to trace the execution and identify where the duplicate key is being generated.
  SAP Notes: Check SAP Notes for any known issues or patches related to the specific table or transaction you are working with.
  Documentation: Review the documentation for the specific table to understand its key fields and constraints.
  
  By following these steps, you should be able to resolve the FRE120 error and prevent it from occurring in the future.