How To Fix MDG_MDF301 - Hierarchies can only be top nodes

MDG_MDF301 - Overview

• Message type: E = Error

• Message class: MDG_MDF - Master Data: Messages

• Message number: 301

• Message text: Hierarchies can only be top nodes

What causes this issue?

You attached hierarchy &v1& to a node in a different hierarchy.
However, hierarchies are only permitted at the highest level.

System Response

The hierarchy cannot be saved.

How to fix this error?

Change the hierarchy definition.

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 MDG_MDF301 - Hierarchies can only be top nodes ?

  The SAP error message MDG_MDF301 ("Hierarchies can only be top nodes") typically occurs in the context of Master Data Governance (MDG) when you are trying to create or modify a hierarchy node that is not allowed to be a child node. This error indicates that the system expects the node you are trying to create or modify to be a top-level node in the hierarchy.
  
  Cause:
  
  Hierarchy Structure: The error usually arises when the system is configured to only allow certain nodes to be top-level nodes. If you attempt to create a node that is intended to be a child of another node, but the system does not permit it, you will encounter this error.
  Data Model Configuration: The data model or the hierarchy configuration in MDG may restrict certain nodes from being part of a hierarchy unless they are defined as top nodes.
  Incorrect Node Type: You may be trying to create a