How can i make .Changed event work with CFrame?

What i want to do is to detect if an object's cframe changed and then set the cframe to its original cframe.

Example script:

local Character = workspace:FindFirstChild(tostring(game:GetService("Players").LocalPlayer.Name))
local Part = Character and Character:FindFirstChild("HumanoidRootPart") or false


Part.Changed:Connect(function(prop)
    if tostring(prop) == "CFrame" then
        Part[prop] = CFrame.new(100,100,100) --Example cframe
    end
end)

However, CFrame doesnt not work with .Changed event. What can i do?