Baseline date for payment does not exist

What causes this issue?

You tried to post a document without a baseline date for payment.
It is not possible to post a documentEin solcher Beleg kann nicht
gebucht werden.

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?

Check the purchase order. Either no payment term has been entered in the
purchase order header, or no baseline date for payment proposal is
defined for the entered payment term in Customizing.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.