How To Fix T0821 - With CorrType & (internal), the 'Enter CoConf.' checkbox has no effect.

T0821 - Overview

• Message type: E = Error

• Message class: T0 - General Treasury

• Message number: 821

• Message text: With CorrType & (internal), the 'Enter CoConf.' checkbox has no effect.

What causes this issue?

In your Customizing settings for correspondence, you have marked the
'Counterconfirmation required' checkbox for <ZH>internal
</>correspondence types &V1&. This checkbox has no influence on the
confirmation status in the transaction.

How to fix this error?

Deactivate the checkbox for correspondence type &V1&.
&FURTHER_SOURCES_OF_INF&
If you wish to maintain the confirmation status in the transaction, you
have to mark the 'Counterconfirmation required' checkbox for the
<ZH>external </>correspondence type. The 'Counterconfirmation' checkbox
must also be marked in <ZH>Standing Instructions Correspondence </>
depending on the business partner.

Error message extract from SAP system. Copyright SAP SE.

T0821 - Details

• The SAP error message T0821 typically relates to issues with the configuration of the confirmation types in the system, particularly when dealing with production orders or confirmations in the context of manufacturing processes. The message indicates that the checkbox for "Enter CoConf." (which stands for "Enter Confirmation") is not functioning as expected.
  
  Cause:
  
  
  Configuration Issues: The error often arises from incorrect or incomplete configuration settings in the production order confirmation types. The system may not recognize the checkbox due to misconfiguration.
  Authorization Issues: Sometimes, the user may not have the necessary authorizations to change or utilize the confirmation types effectively.
  System Bugs: There may be bugs or inconsistencies in the SAP version being used that affect the functionality of the confirmation types.
  Missing Dependencies: The confirmation type may depend on other settings or configurations that are not properly set up.
  
  
  Solution:
  
  
  Check Configuration:
  
  Navigate to the configuration settings for confirmation types in the SAP system (Transaction code: OPL8).
  Ensure