How To Fix KN030 - Key & already exists

KN030 - Overview

• 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.

KN030 - Details

• 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