Roblox "Position cannot be assigned to" error?

So, I have a script that is supposed to teleport a player to a certain position once they die. However, I am getting a "Position cannot be assigned to" error. Here is the code:

local player = game.Players:GetPlayerFromCharacter(hit.Parent)
if hit.Parent:FindFirstChild("Humanoid") then
    while wait(0.1) do
        while wait(0.1) do -- I have 2 loops to make it go a lot longer
            if player.Character.Humanoid.Health == 0 then
                wait(6)
                player.Character.HumanoidRootPart.CFrame.Position = Vector3.new(1, 2, 3)
            end
        end
    end
end

Thanks in advance for any help!