How To Fix RU021 - Confirmation no. &1 does not correspond to order &2, check entry

RU021 - Overview

• Message type: E = Error

• Message class: RU - Messages for order completion confirmation

• Message number: 021

• Message text: Confirmation no. &1 does not correspond to order &2, check entry

What causes this issue?

When an order is created, the system assigns a different confirmation
number to each operation contained in the order. The number is printed
on the shop floor papers.
The confirmation number and the order number that you have entered do
not fit together.

How to fix this error?

There are two options:
Enter the confirmation number only (see shop papers).
Enter data which identifies the operation (for example order number,
sequence number and operation number).

Error message extract from SAP system. Copyright SAP SE.

RU021 - Details

• The SAP error message RU021 indicates that there is a mismatch between the confirmation number and the order number in the system. This typically occurs during the confirmation process in production or order management when the system cannot find a valid link between the confirmation and the corresponding order.
  
  Cause:
  
  Incorrect Confirmation Number: The confirmation number entered does not match any existing confirmations for the specified order.
  Order Number Mismatch: The order number provided does not correspond to the confirmation number in the database.
  Data Entry Errors: Typographical errors during data entry can lead to this issue.
  Deleted or Inactive Orders: The order may have been deleted or is no longer active, leading to the confirmation being invalid.
  System 
  Configuration Issues: There may be configuration issues in the system that affect how confirmations are processed.
  
  
  Solution:
  
  Verify Confirmation and Order Numbers: Double-check the confirmation number and order number for accuracy. Ensure that they are entered correctly without any