How To Fix TU864 - The new cumulated amount cannot be lower than the proposal

TU864 - Overview

• Message type: E = Error

• Message class: TU - Billing/Scheduling/Budget Billing

• Message number: 864

• Message text: The new cumulated amount cannot be lower than the proposal

What causes this issue?

You wanted to change the cumulated payment plan amount. This change is
not admissible, since the new cumulated amount cannot be lower than the
current cumulated payment plan amount.

System Response

The transaction is terminated

How to fix this error?

Enter a new payment plan amount that is higher than the current one.
Enter a reason for changing the amount in the Change Reason field. In
the Customizing settings for the payment plan (table TE641), deselect
the Reduction of Payment Plan Amount Not Permitted indicator if it is
set.

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.

TU864 - Details

• The SAP error message TU864, which states "The new cumulated amount cannot be lower than the proposal," typically occurs in the context of financial transactions, particularly when dealing with budget management, purchase orders, or similar financial documents. This error indicates that the system is preventing a transaction because the new cumulative amount being entered is less than the proposed amount, which is not allowed according to the business rules set in the system.
  
  Cause:
  
  Cumulative Amounts: The error arises when the cumulative amount (the total amount that has been processed or proposed) is being updated to a value that is lower than what has already been proposed or committed.
  Budget Constraints: This can happen in scenarios where there are budgetary constraints in place, and the system is enforcing rules to ensure that the budget is not exceeded or reduced improperly.
  Data Entry Errors: It may also occur due to incorrect data entry, where the