How To Fix MDG_MDF300 - Leaf &1 belongs to type &2

MDG_MDF300 - Overview

• Message type: E = Error

• Message class: MDG_MDF - Master Data: Messages

• Message number: 300

• Message text: Leaf &1 belongs to type &2

What causes this issue?

Value &v1& of characteristic &v2& is defined as a leaf in the hierarchy
-- that is, no further nodes are attached to it. However, a leaf must
belong to the hierarchy-defining characteristic &v3&.

System Response

The hierarchy cannot be used.

How to fix this error?

Modify the hierarchy either by deleting the node from the hierarchy or
by adding more nodes beneath.

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.

MDG_MDF300 - Details

• The SAP error message MDG_MDF300 "Leaf &1 belongs to type &2" typically occurs in the context of Master Data Governance (MDG) when there is an issue with the hierarchy or structure of master data objects. This error indicates that there is a mismatch or inconsistency in the data hierarchy, specifically that a leaf node (a node that does not have any children) is being referenced incorrectly.
  
  Cause:
  
  Hierarchy Structure Issue: The leaf node (e.g., a specific master data record) is not correctly associated with its parent node or is being treated as a different type than expected.
  Data Type Mismatch: The system expects a certain type of data (e.g., a specific category or classification) but finds a different type.
  Configuration Errors: There may be issues in the configuration of the data model or the hierarchy settings in MDG.
  Data Integrity Issues: The data might have been manually altered or imported incorrectly, leading to inconsistencies.
  
  
  Solution:
  
  Check Hierarchy