How To Fix KN030 - Key & already exists

SAP Error Message - Details

• Message type: E = Error

• Message class: KN - Reporting for Costing

• Message number: 030

• Message text: Key & already exists

What causes this issue?

The key you entered already exists.

System Response

The system could not determine a specific sequence for the reports.

How to fix this error?

Enter another key.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message KN030 - Key & already exists ?

  The SAP error message KN030 ("Key & already exists") typically occurs when you are trying to create a new customer master record (or vendor master record) in SAP, and the key (which is usually the customer or vendor number) you are trying to use already exists in the system. This can happen in various transactions related to customer or vendor management.
  Cause:
  
  Duplicate Key: The most common cause is that the customer or vendor number you are trying to create is already assigned to another record in the system.
  Incorrect Data Entry: Sometimes, the error can occur due to a typographical error or incorrect data entry, leading to an attempt to create a record with an existing key.
  Data Migration Issues: If data has been migrated from another system, there may be duplicate entries that were not properly handled.
  
  Solution:
  
  
  Check Existing Records: Before creating a new customer or vendor, check the existing records to see if the key you are trying to use is already in use. You can do this by using transaction codes like XD03 (for customers) or MK03 (for vendors) to display existing records.
  
  
  Use a Different Key: If the key is already in use, you will need to choose a different customer or vendor number that is not already assigned.
  
  
  Review Data Entry: Ensure that you are entering the correct information and that there are no typographical errors in the key you are trying to create.
  
  
  Data Cleanup: If you suspect that there are duplicate records due to data migration or other issues, you may need to perform a data cleanup to resolve these duplicates.
  
  
  Consult with IT or SAP Support: If you are unable to resolve the issue, it may be helpful to consult with your IT department or SAP support for further assistance.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as XD01 (Create Customer), XD02 (Change Customer), XD03 (Display Customer), MK01 (Create Vendor), MK02 (Change Vendor), and MK03 (Display Vendor).
  Authorization Issues: Ensure that you have the necessary authorizations to create or modify customer/vendor records.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message, as there may be specific fixes or recommendations provided by SAP.
  
  By following these steps, you should be able to identify the cause of the KN030 error and take appropriate action to resolve it.