Next settlement &1 after delta accruals &2 already performed

What causes this issue?

If the delta accruals date is before or at the final settlement date, it
can only be performed if the final settlement has not been done yet.
If the delta accruals date is for a delta settlement date, it can only
be performed if the next delta settlement has not been done yet.
You can change this behavior be deactivating the message in customizing.
Then only the last settlement (last delta settlement if with delta
settlements, else final settlement) has still to be open.

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?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.