Correspondence creation not due

What causes this issue?

The due date determination shows that no correspondence is due. This
may be for the following reasons:
Correspondence for this interval has already been created
Correspondence for the previous interval has not yet been created.

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?

You can use the correspondence history to check which correspondence
has already been created.

Error message extract from SAP system. Copyright SAP SE.