"Those therefore who after the manner of wicked heretics dare to set aside ecclesiastical traditions, and to invent any kind of novelty, or to reject any of those things entrusted to the Church, or who wrongfully and outrageously devise the destruction of any of those traditions enshrined in the Catholic Church, are to be punished thus: if they are bishops, we order them to be deposed...."
"I swear to God Almighty and the Savior Jesus Christ that I will keep whatever has been revealed through Christ and His Successors and whatever the first councils and my predecessors have defined and declared."
"I will keep without sacrifice to itself the discipline and the rite of the Church. I will put outside the Church whoever dares to go against this oath, may it be somebody else or I."
The Pope hasn't rejected ecclesiastical traditions or invented any novelty.