Error due to background RFC Customizing for business object type &1

What causes this issue?

There is no inbound destination defined with the prefix MDG_

System Response

The system cannot find an inbound destination with the prefix MDG_ for
the object &1. The messages cannot be sent queued. This may lead
to duplication of messages.

How to fix this error?

Contact your system administrator

Procedure for System Administrators

Define an inbound destination with the prefix MDG_ as follows:
Use transaction <DS:TRAN.SBGRFCCONF>SBGRFCCONF</>
Define a new inbound destination or choose an existing one
Add a new prefix MDG_
Create Scheduler settings for the new inbound destination

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.