Dunning level &1 not defined in dunning procedure &2 of dunning area &3

What causes this issue?

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

System Response

How to fix this error?

INCLUDE 'CUSTOMIZED_MESSAGE_INFO' OBJECT DOKU ID TX

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.