Doc. type &1 selected for &2 has a wrong value for 'Assgn. of Pred.Docs'

What causes this issue?

When creating business documents during freight unit building, the
system must use a document type for which you have selected the
<LS>Completely </>value in the <LS>Assignment of Predecessor Documents
</>field in Customizing.

System Response

The document type that you have selected cannot be used by the system
and is replaced with a default type.

How to fix this error?

Select a document type for which you have selected <LS>Completely</> in
the <LS>Assignment of Predecessor Documents </>field.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.