How To Fix WN108 - There are inconsistencies in class system

WN108 - Overview

• Message type: E = Error

• Message class: WN - Plant master data maintenance (integrated)

• Message number: 108

• Message text: There are inconsistencies in class system

What causes this issue?

At first please remove the inconsistencies in your defined classes and
merchandise categories.

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?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

WN108 - Details

• The SAP error message WN108, which states "There are inconsistencies in class system," typically indicates that there are discrepancies or inconsistencies in the classification system within the SAP system. This can occur in various scenarios, such as when there are issues with the classification data, the class hierarchy, or the characteristics assigned to classes.
  Causes:
  
  Data Inconsistencies: There may be inconsistencies in the classification data, such as missing or incorrect characteristics or values.
  Class Hierarchy Issues: Problems with the class hierarchy, such as circular references or missing parent classes.
  Transport Issues: If changes were transported from one system to another (e.g., from development to production), inconsistencies may arise if the transport was not executed correctly.
  Database Issues: Corruption or issues in the underlying database tables that store classification data.
  Custom Development: Custom programs or enhancements that manipulate classification data may introduce inconsistencies.
  
  Solutions:
  
  Check Class and Characteristic Data: Review the classes and their assigned characteristics to ensure that