Data Provider implementation '&1' '&2' '&3' does not exist

What causes this issue?

The request shall be routed into a backend system which has the software
version '&V1&'. (Assigned via the corresponding system alias.)
But no data provider for model '&V1&' and version '&V2&' has been
registered for software version '&V3&'.

System Response

The system cannot process the request and raises an error.

How to fix this error?

If only one system alias has been assigned to the corresponding service
(check in the IMG activity
<DS:SIMG./IWFND/V_MGDEAM_TEXT>Assign SAP System Aliases to OData
Service</>) delete the service completely in transaction
<DS:TRAN./IWFND/MAINT_SERVICE>Maintain Services</> and then re-create
it.
If more than one system alias has been assigned to the service (via IMG
activity
<DS:SIMG./IWFND/V_MGDEAM_TEXT>Assign SAP System Aliases to OData
Service</>) you need to manually create the data provider assignment as
well. For this you can use IMG activity
<DS:SIMG./IWFND/V_MGDPIM_TEXT>Assign Data Provider to Data Model</>.
Copy the existing entry for the model and replace the software version
with version '&V3&'.

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.