Spike Trap Script Will Not Tween Objects To CFrame Due To Dictionary Error?

Script Inside Spike Trap Model

local Spikes = {}

local Model = script.Parent
local Base = Model.Base

local TweenService = game:GetService("TweenService")

local CanSpike = true


for i,v in pairs(Model:GetChildren()) do
    if v:IsA("BasePart") then
        if v.Name == "Spike" or v.Name ~= "Base" then
            table.insert(Spikes,v)
        end
    end
end

repeat wait() until table.getn(Spikes) ~= 0

function createTweeningValues(Part)
    local UpCFrame = Instance.new("CFrameValue")
    local DownCFrame = Instance.new("CFrameValue")
    UpCFrame.Name = "Up"
    DownCFrame.Name = "Down"

    UpCFrame.Parent = Part
    DownCFrame.Parent = Part

    UpCFrame.Value = CFrame.new(Part.CFrame.X,Part.CFrame.Z+Part.Size.Z,Part.CFrame.Y)
    DownCFrame.Value = CFrame.new(Part.CFrame.X,Part.CFrame.Z-Part.Size.Z,Part.CFrame.Y)
end

function tween(Part)
    local Twn = TweenService:Create(Part,TweenInfo.new(2),Part.Up.Value)
    Twn:Play()
    wait(2)
    local Twn2 = TweenService:Create(Part,TweenInfo.new(2),Part.Down.Value)
    Twn2:Play()
end

for _,Spike in pairs(Spikes) do
    createTweeningValues(Spike)
end

Base.Touched:Connect(function(hit)
    local Par = hit.Parent
    local Player = game.Players:GetPlayerFromCharacter(Par)
    if Player and CanSpike then
        CanSpike = false
        for _,Spike in pairs(Spikes) do
            tween(Spike)
        end
        wait(5)
        CanSpike = true
    end
end)

Error 22:53:02.361 - Unable to cast to Dictionary 22:53:02.361 - Stack Begin 22:53:02.361 - Script 'Workspace.SpikeTrap.Script', Line 34 - global tween 22:53:02.362 - Script 'Workspace.SpikeTrap.Script', Line 49 22:53:02.362 - Stack End