(LifeSiteNews) — On Thursday morning, Pope Leo XIV publicly praised a Vatican document that has already sparked one of the most serious Marian controversies in decades. Mater Populi Fidelis declares that the Marian title “Co-Redemptrix” is “always inappropriate,” and it discourages the title “Mediatrix of All Graces,” claiming it is not clearly grounded in revelation and risks confusion. They called the Vatican note an “anti-development of doctrine.”Because the document cuts away the doctrine those titles express. But the opposition to the Vatican document extends even to Pope Leo XIV’s backyard—his own former diocese. In Chiclayo, Peru—where Pope Leo served as bishop for eight years—more than 100 Catholics have formally petitioned him, urging him to reconsider what they call a “truly scandalous” and “harmful” Vatican document.