What to do So if I touch previous checkpoint again leaderstat should change to previous num. again?

These are the scripts. :- Inside every checkpoint

-- inside the each and every checkpoint
local spawn = script.Parent
spawn.Touched:connect(function(hit)
    if hit and hit.Parent and hit.Parent:FindFirstChild("Humanoid") then
        local player = game.Players:GetPlayerFromCharacter(hit.Parent)
        local checkpointData = game.ServerStorage:FindFirstChild("CheckpointData")
        if not checkpointData then
            checkpointData = Instance.new("Model", game.ServerStorage)
            checkpointData.Name = "CheckpointData"
        end

        local checkpoint = checkpointData:FindFirstChild(tostring(player.userId))
        if not checkpoint then
            checkpoint = Instance.new("ObjectValue", checkpointData)
            checkpoint.Name = tostring(player.userId)

            player.CharacterAdded:connect(function(character)
                wait()
                character:WaitForChild("HumanoidRootPart").CFrame = game.ServerStorage.CheckpointData[tostring(player.userId)].Value.CFrame + Vector3.new(0, 4, 0)
            end)
        end

        checkpoint.Value = spawn
    end
end)

Another script inside the checkpoint

-- inside the each and every checkpoint
function ot(hit)
if hit.Parent ~= nil then
local player = game.Players:playerFromCharacter(hit.Parent)
if player ~= nil then
if player.leaderstats.Stage.Value == script.Parent.Name - 1 then
local h = hit.Parent:FindFirstChild("Humanoid")
if h ~= nil then
if h.Health ~= 0 then
player.leaderstats.Stage.Value = script.Parent.Name
end end end end end end

script.Parent.Touched:connect(ot)

And this script in Workspace

-- inside the Workspace
function oa(object)
local player = game.Players:playerFromCharacter(object)
if player ~= nil then
local ls = player.leaderstats
local sl = game.Workspace:FindFirstChild(ls.Stage.Value)
print("gah")
object.Torso.CFrame = object.Torso.CFrame + Vector3.new(0,3,0)
wait()
object.Torso.CFrame = sl.CFrame + Vector3.new(0,3,0)
end end

function oe(object)
if object.className == "Player" then
local ack = Instance.new("IntValue")
ack.Name = "leaderstats"
local ack2 = Instance.new("IntValue")
ack2.Name = "Stage"
ack2.Value = 0
ack2.Parent = ack
ack.Parent = object
end end

game.Players.ChildAdded:connect(oe)
game.Workspace.ChildAdded:connect(oa)

What should I add or change in these scripts to make them work like I want to?