After serious study of the subject, I certainly agree with the following taken from one much more learned than myself:
"All in all, the fallacious arguments that Oliveieri submitted in his Summation, the Congregation of the Index was grossly ill-advised when it came time to deciding whether to grant an imprimatur to Canon Settele. Under such duress and false information, the whole affair is tainted from start to finish. Olivieri may have been successful in obtaining an imprimatur for Settele but this did not mean the Church's condemnation of heliocentrism had been rescinded. Imprimaturs given to private books have no authority in overturning Congregational decrees approved by supreme pontiffs and/or facilitated by a canonical trial, as was the case in both 1616 and 1633. In face of the fact that the permission initially given to Galileo's Dialogo was later rescinded by the 1633 magisterium because it found the imprimatur was issued under false pretenses, makes the Settele imprimatur mor of an anomaly than a precedent. In addition Copernicus, Zuniga, Foscarini, Kepler, and Galileo remained on the Index. Hence, the Settele affair proved only one thing, namely, that a high-placed cleric could convince his peers with pretentious scientific claims that neither he nor they could prove since the science of cosmology was still in its infancy. As we noted in the case of Bradley versus Airy, science would not mature nearly enough to shed sufficient light on Olivieri's claims until long after he and his contemporaies had died. And when it shed its light, it would show that Olivieri's claims were fallacious.
As for Pius Vll's role in the Settele affair, although there are various accounts that, after receiving Olivieri's report, he helped smooth the pathway for Settele to obtain the imprimatur, no docuмent exists containing a quote directly from Pius VII endorsing either Settele or heliocentrism."