How To Fix AJ793 - Contract &2 billing document &1 does not belong to installation group

AJ793 - Overview

• Message type: E = Error

• Message class: AJ - Billing program

• Message number: 793

• Message text: Contract &2 billing document &1 does not belong to installation group

What causes this issue?

Billing document &v1& belongs to installation &v3&. This installation a
secondary installation to primary installation &v4& in the document
billing period. However, one of the following historical characteristics
of the secondary installation has changed in the document billing
period:
The secondary installation <DS:DE.INSTROLE>role</>
The <DS:DE.MAININST>primary installation key</>
The <DS:DE.INSTGRTYPE>grouping type</> of the primary installation
These changes are not permitted.

System Response

Primary installation billing is cancelled.

How to fix this error?

You have the following options:
Change the historical characteristics of installation &V3&.
Bill installation &V3& until the date the changes were made. This
enables you to avoid the change in the billing period of a document.

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.

AJ793 - Details

• The SAP error message AJ793 indicates that there is a mismatch between the billing document and the installation group associated with a contract. This typically occurs in the context of billing processes, particularly in the SAP Convergent Charging (SAP CC) or SAP Convergent Invoicing (SAP CI) modules.
  
  Cause:
  
  Installation Group Mismatch: The billing document is linked to an installation group that does not match the installation group of the contract. This can happen if the contract was created for a different installation group or if the billing document was incorrectly assigned.
  Data Inconsistency: There may be inconsistencies in the master data, such as the installation group settings in the contract or billing document.
  
  Configuration Issues: Incorrect configuration in the system regarding installation groups and their relationships with contracts and billing documents.
  
  
  Solution:
  
  
  Check Installation Groups: Verify the installation group assigned to both the contract and the billing document. Ensure they match. You can do this by:
  
  Navigating