How To Fix REBDCA018 - Higher-level objects of &1 are already assigned in another hierarchy

SAP Error Message - Details

• Message type: E = Error

• Message class: REBDCA - Messages for Master Data - General

• Message number: 018

• Message text: Higher-level objects of &1 are already assigned in another hierarchy

What causes this issue?

A usage object, which is superordinate to the current usage object, is
already assigned to a different architectural hierarchy. The subordinate
object, however, has to be assigned to the same architectural hierarchy
as its superordinate object.

System Response

It is not possible to assign the current usage object to the selected
architectural hierarchy.

How to fix this error?

Select an architectural object from the same hierarchy to which the
superordinate usage object is assigned.

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 REBDCA018 - Higher-level objects of &1 are already assigned in another hierarchy ?

  The SAP error message REBDCA018 indicates that there is an issue with the assignment of higher-level objects in a hierarchy. This typically occurs in the context of SAP's controlling (CO) module, particularly when dealing with cost centers, internal orders, or other hierarchical structures.
  Cause:
  The error message REBDCA018 is triggered when you attempt to assign a higher-level object (like a cost center or internal order) to a new hierarchy, but that object is already assigned to another hierarchy. This can happen if:
  
  Duplicate Assignments: The higher-level object is already part of a different hierarchy, and SAP does not allow multiple assignments for the same object in different hierarchies.
  Hierarchy Structure Changes: Changes in the hierarchy structure may lead to conflicts if the same object is being reassigned.
  Data Integrity Issues: There may be inconsistencies in the data that prevent the assignment from being processed.
  
  Solution:
  To resolve the REBDCA018 error, you can take the following steps:
  
  
  Check Current Assignments:
  
  Use transaction codes like OKA1 (for cost centers) or KAH2 (for internal orders) to check the current hierarchy assignments of the higher-level object.
  Identify if the object is indeed assigned to another hierarchy.
  
  
  
  Remove Existing Assignments:
  
  If the object is assigned to a different hierarchy and you want to move it, you will need to remove it from the current hierarchy first.
  Use the appropriate transaction to delete or change the assignment.
  
  
  
  Reassign the Object:
  
  After removing the existing assignment, you can proceed to assign the higher-level object to the desired hierarchy.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or help files related to hierarchy management in the CO module for additional guidance.
  
  
  
  Check for Authorizations:
  
  Ensure that you have the necessary authorizations to make changes to the hierarchy assignments.
  
  
  
  Contact SAP Support:
  
  If the issue persists or if you are unsure about making changes, consider reaching out to your SAP support team or consulting SAP Notes for specific guidance related to your version of SAP.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as OKA1, KAH2, KAH3, etc., for managing cost centers and internal orders.
  SAP Notes: Search for SAP Notes related to REBDCA018 for any patches or updates that may address this issue.
  Hierarchy Management: Understanding how hierarchies work in SAP CO can help prevent similar issues in the future.
  
  By following these steps, you should be able to resolve the REBDCA018 error and successfully manage your hierarchy assignments in SAP.