Is there any possibility of redoing a report/attestation that has already been generated and thus has a protocol number assigned?

Yes, in the event that it becomes necessary to reissue a report/attestation associated with a protocol number (and therefore unmodifiable) because it is incorrect or contains inconsistent information, it will be possible to follow this procedure:

Navigate to Configuration → Protocol Numbers

Here simply access the list of protocol numbers generated using the appropriate button:

and for each Report/Attestation generated the name of the associated student and the course of reference will appear, as well as a trash can icon for deletion, using the latter the report will return within the course as again "generable"

For information regarding the generation of certificates with associated protocol numbers refer to this GUIDE