How To Fix 7A021 - Enter a unique reference object

7A021 - Overview

• Message type: E = Error

• Message class: 7A - PS Progress Analysis

• Message number: 021

• Message text: Enter a unique reference object

What causes this issue?

You have not selected a unique reference object.

System Response

INCLUDE 'NA_ALLG_NOVERARBEITUNG' OBJECT DOKU ID TX

How to fix this error?

Enter one of the following:
WBS element
Network and activity
Network, activity, and activity element
Order

Error message extract from SAP system. Copyright SAP SE.

7A021 - Details

• The SAP error message 7A021 ("Enter a unique reference object") typically occurs in the context of SAP when a user is trying to create or modify a document or entry that requires a unique reference object, such as a purchase order, sales order, or other transactional data. This error indicates that the system has detected a duplicate reference object, which is not allowed.
  
  Cause:
  
  Duplicate Entry: The most common cause of this error is that the reference object (like a document number or ID) you are trying to enter already exists in the system.
  Incorrect Data Entry: The user may have mistakenly entered the same reference object multiple times or may have copied and pasted data that includes duplicates.
  
  Configuration Issues: In some cases, the system configuration may not be set up to allow for certain types of reference objects to be reused.
  
  
  Solution:
  
  Check Existing Entries: Verify if the reference object you are trying to