After Clemente came out as Pope, +Thuc repdiated the group and said he no longer had any association with them, and then asked for the excommunication to be lifted by the Vatican, and the latter complied.
I have searched far and wide for allegation made The Angelus, and have found absolutely no independent confirmation (just people citing it), and not source for it ever cited.
This is an invented criteria by Dogmatic sedes. That we have to see the original letter.
The credible publication of Angelus press gives us enough reason to cast doubt. Not to say for sure. Just doubt.
And so we must go ask the man himself.
But can't. He's dead.
Therefore conditional consecrations are needed.