How To Fix UD402 - & is a root node and cannot be added to as a sibling

UD402 - Overview

• Message type: E = Error

• Message class: UD - EDM - Enterprise Data Model

• Message number: 402

• Message text: & is a root node and cannot be added to as a sibling

What causes this issue?

You tried to add a node to the same level of the current hierarchy as
the root node, i.e. as a sibling. This is not allowed.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message UD402 - & is a root node and cannot be added to as a sibling ?

  The SAP error message UD402, which states "is a root node and cannot be added to as a sibling," typically occurs in the context of working with hierarchical data structures, such as when managing organizational units, cost centers, or other master data that is structured in a tree format.
  
  Cause:
  The error arises when you attempt to add a node (e.g., a new organizational unit or cost center) as a sibling to a root node. In hierarchical structures, a root node is the topmost node in the hierarchy, and it cannot have siblings because it does not belong to any parent node. Instead, all other nodes must be children of the root node or other nodes in the hierarchy.
  
  Solution:
  To resolve this error, you should ensure that you are correctly structuring your data. Here are some steps you can take:
  
  
  Check Hierarchy Structure: Verify the current hierarchy structure to understand where the root node