Why does it say that 'model is not a valid member of workspace'?

-------------------------------------< variables >---------------------------------------
local model = workspace.Model
local dummies = model:GetChildren("Dummy")
local humsInGame = {}
-------------------------------------< code >--------------------------------------------
script.Parent.Touched:Connect(function(hit)
    game.Players.PlayerAdded:Conect(function(pl)
        local char = pl.Character
        if char then
            print("found")
        end
    end)
end)

this script is parented to a part that is parented to a tool in the starter pack (the part is called Handle btw) why does it say'

20:09:44.823 - Model is not a valid member of Workspace