How To Fix TU863 - The new amount for contract &1 cannot be lower than the proposal

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 863

• Message text: The new amount for contract &1 cannot be lower than the proposal

What causes this issue?

You want to change the payment plan amount for contract &1. This change
is not permitted since the new amount cannot be lower than or equal to
the proposed amount.

System Response

The transaction is terminated.

How to fix this error?

Enter a new payment plan amount that is equal to or higher than the
current amount.
Enter a reason for changing the amount in the reason code field.
In the Customizing settings for the payment plan (table TE641) deselect
the Reduction of Payment Plan Amount Not Permitted indicator 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.