How do I fix this?

I have this in a local script, inside a textbutton, to equip a tool, the tool is in replicated storage, plsfix

local player = game.Players.LocalPlayer
local pickaxe = player.Backpack:FindFirstChild("Pickaxe")

script.Parent.MouseButton1Click:connect(function(player)
    local pickaxe = player.Backpack:findFirstChild("Pickaxe")
    if script.Parent.Text == "Unequip" then
        pickaxe.Parent = game.ServerStorage
        script.Parent.Text = "Equip"
    else
        pickaxe:Clone().Parent = player.Backpack
        script.Parent.Text = "Unequip"
    end
end)