Weld Keeps disappearing in online mode why is this?

I have created a script that takes a part and when z is pressed it is place don the head. However for some reason on online mode the weld that sticks it to the face ends up in nil space. Here is the script.

wait()
ObjStorage = game.ReplicatedStorage.ObjStorage
ContextActionService = game:GetService("ContextActionService")
plr = game.Players.LocalPlayer
char = plr.Character
hum = char.Humanoid
bool = true
function mask(ActionName, InputState, InputObj)
    if InputState == Enum.UserInputState.Begin then
        if bool then
            wait(.1)
            bool = false
            HatRemover(true)
            Balaclava(true)
        elseif not bool then
            wait(.1)
            bool = true
            Balaclava(false)
            HatRemover(false)

        end
    end
end
ContextActionService:BindAction("Mask",mask,false,Enum.KeyCode.Z)

function HatRemover(t)
    if t then
    for i,v in pairs(char:GetChildren()) do
        if v:IsA("Accessory") or v:IsA("Hat") then
            v.Parent = script
        end
    end
    elseif not t then
        for i,v in pairs(script:GetChildren()) do
            v.Parent = char
        end
    end
end
local boln = true
function Balaclava(t)
    if t and boln then
    boln = false
    m = ObjStorage.Balaclava:Clone()
    m.Parent = char
    m.Handle.Transparency = 0
    m.Handle.Anchored = false
    local weld = Instance.new("Weld", m.Handle)
    weld.C1 = CFrame.new(0, 0.600000024, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1)
    weld.C0 = CFrame.new(0, 0, -0.600000024, 1, 0, 0, 0, -4.37113883e-08, 1, 0, -1, -4.37113883e-08)
    weld.Part1 = char.Head
    weld.Part0 = weld.Parent
    wait(.5)
    print(weld.Parent)
    elseif not t and not boln then
        m:Destroy()
        boln = true
    end 
end

May anyone tell me why this may not be wokring on online mode?