How To Fix DC1601 - Object &1 has entries with the same key in table &2

SAP Error Message - Details

• Message type: E = Error

• Message class: DC1 - BDT-DC Messages

• Message number: 601

• Message text: Object &1 has entries with the same key in table &2

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DC1601 - Object &1 has entries with the same key in table &2 ?

  The SAP error message DC1601 indicates that there are duplicate entries in a database table, specifically that an object (identified by &1) has entries with the same key in the specified table (&2). This typically occurs during data processing or when trying to save data in a table that requires unique keys.
  Cause:
  
  
  Duplicate Data: The most common cause is that the data being inserted or updated in the table already contains entries with the same key. This can happen due to:
  
  Data import processes that do not check for existing records.
  Manual data entry errors.
  Issues in data synchronization between systems.
  
  
  
  Incorrect Configuration: Sometimes, the configuration of the system or the data model may not enforce uniqueness correctly, leading to duplicates.
  
  
  Concurrency Issues: If multiple users or processes are trying to insert or update the same data simultaneously, it can lead to conflicts and duplicates.
  
  
  Solution:
  
  
  Identify Duplicates: Use SQL queries or transaction codes (like SE11 for table display) to identify the duplicate entries in the specified table. You can run a query to find all entries with the same key.
  Example SQL query:
  SELECT key_field, COUNT(*)
  FROM table_name
  GROUP BY key_field
  HAVING COUNT(*) > 1;
  
  
  Remove or Update Duplicates: Once you identify the duplicates, you can either:
  
  Delete the duplicate entries if they are not needed.
  Update the entries to ensure that they have unique keys.
  
  
  
  Data Validation: Implement data validation checks in your data entry processes or import routines to prevent duplicates from being created in the first place.
  
  
  Review Configuration: Check the configuration of the table and ensure that the primary key or unique constraints are correctly defined.
  
  
  Locking Mechanisms: If concurrency is an issue, consider implementing locking mechanisms or transaction management to prevent simultaneous updates that could lead to duplicates.
  
  
  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.
  SAP Notes: Check SAP Notes for any known issues or patches related to the specific table or object you are working with.
  Documentation: Review the documentation for the specific module or functionality you are working with to understand the expected behavior regarding data integrity and uniqueness.
  
  By following these steps, you should be able to resolve the DC1601 error and prevent it from occurring in the future.