TakeDamage is not a valid member of Model?

I've made a box that spawns infront of the player and damages any other players, however instead of damaging players I just get this error: "TakeDamage is not a valid member of Model"

local HB = game.ServerStorage.HB1:WaitForChild("H1")
            local Character = player.Character
            local Hitb = HB:Clone()
            Hitb.CFrame = Character.HumanoidRootPart.CFrame * CFrame.new(0,0,-5)
            Hitb.Parent = workspace

            Touch = Hitb.Touched:connect(function(hit)
                if hit.Parent:FindFirstChild("Humanoid") then
                    if hit.Parent.Name ~= player.Name then
                        hit.Parent:TakeDamage(15)
                        if Touch ~= nil then Touch:Disconnect() end
                        Hitb:Destroy()
                    end
                end
            end)