No default value found for the document type

What causes this issue?

During automatic purchasing document creation, the system requires a
default value for the document type, which could not be found.

System Response

Processing is canceled.

How to fix this error?

In Customizing for Purchasing under 'Define Default Values for Document
Type', enter a default value for transaction MB01 (regardless of whether
you work with transaction MB01 or MIGO).

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.