> Document &: Dunning level &, days in arrears &, status &

What causes this issue?

Current dunning status of the document. The following statuses can
occur. Upper and lower case denote which statement is applicable.
./x - Item has no dunning block indicator/dunning block for item
D/d - Item is due/not due
P/p - Item is payable/not payable
I/i - Interest is calculated/not calculated for the item

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

Example
Status <(><<)>BDpI> indicates a due, non-payable item for which
interest is calculated and that has dunning block B.

System Response

How to fix this error?

Error message extract from SAP system. Copyright SAP SE.