How To Fix DT145 - Key field & was inserted into existing key

SAP Error Message - Details

• Message type: E = Error

• Message class: DT - Table activation (incl. indexes)

• Message number: 145

• Message text: Key field & was inserted into existing key

What causes this issue?

You have inserted field &1 in the existing key. This is not allowed in
support package systems.

System Response

The table will not be activated.

How to fix this error?

Remove the change.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DT145 - Key field & was inserted into existing key ?

  The SAP error message DT145 ("Key field & was inserted into existing key") typically occurs in the context of data management, particularly when dealing with database tables or data records in SAP. This error indicates that there is an issue with the uniqueness of key fields in a database table or data structure.
  Cause:
  
  Duplicate Key Insertion: The error arises when an attempt is made to insert a record with a key field value that already exists in the database. Key fields are meant to be unique identifiers for records, and inserting a duplicate violates this constraint.
  Data Migration or Upload Issues: If you are migrating data or uploading records into SAP, this error can occur if the source data contains duplicates for key fields.
  Incorrect Configuration: Sometimes, the configuration of the data model or the way the data is being processed can lead to attempts to insert duplicate keys.
  
  Solution:
  
  
  Check for Duplicates: Before inserting new records, check the existing records in the database to ensure that the key field values you are trying to insert do not already exist.
  
  You can use transaction codes like SE16 or SE11 to view the table and check for existing records.
  
  
  
  Modify the Data: If you find duplicates in your source data, you will need to either:
  
  Remove the duplicates.
  Modify the key field values to ensure they are unique before attempting the insertion again.
  
  
  
  Adjust Data Upload Logic: If you are using a data upload tool (like LSMW, BAPIs, or BDC), ensure that the logic correctly handles existing records. You may need to implement checks to skip or update existing records instead of trying to insert them.
  
  
  Error Handling in Code: If this error is occurring in a custom program or report, implement error handling to catch this specific error and provide meaningful feedback or corrective actions.
  
  
  Consult Documentation: Review SAP documentation or notes related to the specific module or transaction you are working with, as there may be additional context or specific solutions provided by SAP.
  
  
  Related Information:
  
  Key Fields: In SAP, key fields are defined in the data dictionary (DDIC) and are crucial for maintaining data integrity.
  Database Constraints: Understanding how primary keys and unique constraints work in the underlying database can help in troubleshooting these types of errors.
  Transaction Codes: Familiarize yourself with transaction codes like SE11 (Data Dictionary), SE16 (Data Browser), and SE78 (SAP Archive Link) for managing and viewing data structures.
  
  If the problem persists after following these steps, consider reaching out to your SAP Basis or development team for further assistance, as they may have additional insights or access to logs that can help diagnose the issue.