Document or documents in loan &1 cannot be reversed

What causes this issue?

At least one document exists that is dependent on financial mathematics.
This is preventing the system from executing the reversal for the loan.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Check whether the any subsequent documents relevant for financial
mathematics exist. Reverse these first.
These subsequent documents can be debit positions or in loans managed
according to the actual principle they can also be waivers, write-offs
or incoming payments. You can use the cash flow display or the account
statement for the contract to help you to find these documents.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.