How To Fix WRF_ARTICLE_SCREENS021 - The "Main Assignment" indicator is not maintained consistently

WRF_ARTICLE_SCREENS021 - Overview

• Message type: E = Error

• Message class: WRF_ARTICLE_SCREENS - Message for Errors in Material Screens

• Message number: 021

• Message text: The "Main Assignment" indicator is not maintained consistently

What causes this issue?

A main assignment is only consistent if the relevant assignments are
located within the same category and the validity periods form an
uninterrupted series. You must have defined at least one assignment as a
main assignment.
These conditions have not been met with the current assignments, that is
to say, either assignments in different categories were defined as the
main assignment, the defined assignments are located within the same
category but do not form an uninterrupted series, or no assignment was
defined as the main assignment.
In addition, the valid-from date of a main assignment cannot be in the
future.
Continued maintenance is only possible in article hierarchy maintenance.

System Response

The system did not transfer the entered assignments.

How to fix this error?

Define the main assignments in such a way that the above conditions are
met and the required consistency is achieved.

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 WRF_ARTICLE_SCREENS021 - The "Main Assignment" indicator is not maintained consistently ?

  Certainly! Here's a detailed explanation for the SAP error message:
  
  SAP Error Message:
  WRF_ARTICLE_SCREENS021
  Text: The "Main Assignment" indicator is not maintained consistently.
  
  
  Cause:
  This error typically occurs in SAP Retail (IS-Retail) when maintaining article master data, specifically in the assignment of articles to assortments, assortment groups, or article hierarchies. The "Main Assignment" indicator is used to mark a primary or main assignment of an article to a particular grouping or assortment.
  The inconsistency arises when:
  
  The "Main Assignment" indicator is set for more than one assignment where only one main assignment is allowed.
  The "Main Assignment" indicator is missing where it is mandatory.
  There is a mismatch or conflict in the assignment data, such as multiple main assignments for the same article in the same context.
  
  
  Explanation:
  In SAP Retail, an article can be assigned to multiple assortments or groups, but only one of these assignments can be marked as the "Main Assignment." This main assignment is important for processes