Why my hat giver in GUI works only in local (only this player can see this hat)?

Hello, I have script in GUI which giving hat but only person which clicks this button can see this hat. Also script is in local script.

this is this script

local player = game:GetService("Players").LocalPlayer

script.Parent.MouseButton1Click:connect(function()
	if player.Character:findFirstChild("Humanoid") ~= nil and player.Character:findFirstChild("Head6") == nil then
		local g = game.ReplicatedStorage.Berets.ZANDARMERIA.Head6:clone()
		g.Parent = player.Character
		local C = g:GetChildren()
		for i=1, #C do
			if C[i].className == "Part" or C[i].className == "UnionOperation" then
				local W = Instance.new("Weld")
				W.Part0 = g.Middle
				W.Part1 = C[i]
				local CJ = CFrame.new(g.Middle.Position)
				local C0 = g.Middle.CFrame:inverse()*CJ
				local C1 = C[i].CFrame:inverse()*CJ
				W.C0 = C0
				W.C1 = C1
				W.Parent = g.Middle
			end
				local Y = Instance.new("Weld")
				Y.Part0 = player.Character["Head"]
				Y.Part1 = g.Middle
				Y.C0 = CFrame.new(0, 0, 0)
				Y.Parent = Y.Part0
		end

		local h = g:GetChildren()
		for i = 1, # h do
			h[i].Anchored = false
			h[i].CanCollide = false
		end
	elseif player.Character:findFirstChild("Humanoid") ~= nil and player.Character:findFirstChild("Head6") then
		player.Character.Head6:remove()
	end
end)