Perhaps you need to review the Augustinian/Pelagian controversy yourself and get back to us...
Is that the royal plural you're using?
The Catholic Church identified and condemned Pelagianism before Pelagius himself was even in the ground. It likewise identified and condemned Semi-Pelagianism almost 1500 years ago.
I am hardly an expert on the controversy between Augustine and Pelagius, but at this point it seems likely that I better informed about it than you are.