EDI: Inbound partner profile does not exist

What causes this issue?

An inbound partner profile could not be found with the following key:
&v1&
This involves the key fields of table EDP21:
-SNDPRN partner number of sender
-SNDPRT partner type of sender
-SNDPFC partner function of sender
-MESTYP logical message type
-MESCOD logical message code
-MESFCT logical message function
-TEST test flag

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?

Please check the inbound partner profiles.
IF &DEVICE&='SCREEN'
<ds:TRAN.WE20>Execute function</>
ENDIF

Error message extract from SAP system. Copyright SAP SE.