How To Fix FDT_CORE276 - Data cannot be moved into table due to duplicate keys

SAP Error Message - Details

• Message type: E = Error

• Message class: FDT_CORE - Formula & Derivation Tool: Core

• Message number: 276

• Message text: Data cannot be moved into table due to duplicate keys

What causes this issue?

You try to move table data from a BRFplus table into an external ABAP
table that has a unique key constraint.
The data that shall be moved into the external table violates the unique
key constraints: At least two lines of the table data have the same
unique key.

System Response

The system triggers a CX_FDT_INPUT exception.

How to fix this error?

Ensure that the data to be moved into the external table does not
violate the unique key constraints.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message FDT_CORE276 - Data cannot be moved into table due to duplicate keys ?

  The SAP error message FDT_CORE276 indicates that there is an attempt to insert or move data into a table, but the operation fails due to the presence of duplicate keys. This typically occurs in scenarios where the data being processed violates the unique constraints defined for the table.
  Cause:
  
  Duplicate Data: The most common cause is that the data being inserted or moved contains duplicate entries for fields that are defined as unique keys in the target table.
  Incorrect Data Mapping: If the data mapping or transformation logic is not correctly set up, it may lead to duplicates being generated during the data processing.
  Data Integrity Issues: There may be existing data in the target table that conflicts with the incoming data, leading to key violations.
  Concurrency Issues: If multiple processes are trying to insert data simultaneously, it may lead to race conditions that result in duplicates.
  
  Solution:
  
  Identify Duplicates: Check the data being processed to identify any duplicate entries. You can use SQL queries or data profiling tools to find duplicates in the source data.
  Review Unique Constraints: Examine the unique constraints defined on the target table to understand which fields are causing the conflict.
  Data Cleansing: Cleanse the data to remove duplicates before attempting to insert or move it into the target table. This may involve deduplication processes or filtering out duplicate records.
  Adjust Data Mapping: If the issue arises from incorrect data mapping, review and adjust the mapping logic to ensure that it does not generate duplicates.
  Error Handling: Implement error handling in your data processing logic to catch and log instances of duplicate key violations, allowing for easier troubleshooting.
  Batch Processing: If applicable, consider processing data in smaller batches to minimize the risk of duplicates being generated during concurrent operations.
  
  Related Information:
  
  Transaction Logs: Check transaction logs for more details on the error and the specific records that caused the issue.
  SAP Notes: Look for relevant SAP Notes or documentation that may provide additional insights or patches related to this error.
  Data Model Documentation: Review the data model documentation to understand the relationships and constraints defined for the tables involved.
  Testing: After making changes, conduct thorough testing to ensure that the issue is resolved and that no new duplicates are introduced.
  
  By following these steps, you should be able to resolve the FDT_CORE276 error and ensure that data can be moved into the target table without violating unique constraints.