How To Fix WXP026 - Column value &1 for characteristic &2 is not defined

WXP026 - Overview

• Message type: E = Error

• Message class: WXP - Retail Planning

• Message number: 026

• Message text: Column value &1 for characteristic &2 is not defined

What causes this issue?

YOu have defined characteristic value &V1& for the layout in the column
for characteristic &V2&. Alternatively, you have entered characteristic
value &V1& in the column for characteristic &V2&.
The planning hierarchy is not, however, defined for the relevant master
record.

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?

Change the <DS:SIMG.WIS_PLAN_0091>planning layout</> in Customizing or
change the entry in the characteristic screen.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

WXP026 - Details

• Certainly! Here's a detailed explanation for the SAP error message:
  
  SAP Error Message:
  WXP026: Column value &1 for characteristic &2 is not defined
  
  Meaning / 
  Cause:
  This warning message occurs in SAP when a value that is being assigned or processed for a particular characteristic (also called a "class characteristic") is not defined in the system. In other words, the system expects a predefined set of allowed values for a characteristic, but the value provided (column value &1) does not exist in the characteristic's value list.
  This typically happens in classification, variant configuration, or when working with characteristics in master data or configuration tables.
  
  Common Scenarios:
  
  When uploading or entering data into a classification system and the value for a characteristic is not maintained in the characteristic's value table.
  When using variant configuration and a characteristic value is referenced that is not part of the allowed values.
  When integrating or migrating data where characteristic values are missing or inconsistent.
  When