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!