How To Fix KG866 - An entry with the same source data already exists

SAP Error Message - Details

• Message type: E = Error

• Message class: KG - CO-PA Planning

• Message number: 866

• Message text: An entry with the same source data already exists

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message KG866 - An entry with the same source data already exists ?

  The SAP error message KG866 ("An entry with the same source data already exists") typically occurs in the context of the Controlling (CO) module, particularly when dealing with cost center planning, internal orders, or other planning-related activities. This error indicates that there is an attempt to create or modify a planning entry that already exists in the system with the same key data.
  Cause:
  
  Duplicate Entries: The most common cause of this error is that there is already an existing entry in the planning table for the same cost center, period, and other relevant fields.
  Incorrect Data Entry: Sometimes, the data being entered may inadvertently match an existing entry due to incorrect or incomplete data entry.
  Data Migration Issues: If data has been migrated from another system or from a previous version of SAP, there may be duplicate entries that were not cleaned up.
  Concurrent Users: If multiple users are trying to enter or modify data simultaneously, one user may create an entry that another user is trying to create, leading to this error.
  
  Solution:
  
  Check Existing Entries: Review the existing planning entries for the relevant cost center, period, and other key fields to identify if a duplicate entry already exists. You can do this by using transaction codes like KP06 (Cost Center Planning) or KP26 (Activity Type Planning).
  Modify or Delete Duplicates: If you find a duplicate entry, you can either modify it or delete it if it is not needed. Ensure that you have the necessary authorizations to make these changes.
  Adjust Data Entry: Ensure that the data being entered is unique and does not conflict with existing entries. Double-check the key fields to avoid duplicates.
  Consult with Colleagues: If you suspect that another user may be creating the same entry, coordinate with your team to avoid concurrent modifications.
  Data Cleanup: If the issue arises from data migration, consider running a cleanup process to remove or consolidate duplicate entries.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes for planning in SAP CO, such as KP06, KP26, and KP90 (for planning versions).
  Authorization: Ensure that you have the necessary authorizations to view and modify planning data.
  SAP Notes: Check SAP Notes for any specific patches or updates related to this error message, as there may be known issues or fixes provided by SAP.
  Documentation: Review SAP documentation or help files related to planning in the CO module for best practices and guidelines on data entry.
  
  If the problem persists after following these steps, it may be beneficial to consult with your SAP support team or reach out to SAP support for further assistance.