I can't Unequip tools, I'm sure I did it correct, any help?

Hi. Question for this Hotbar. In line 119 and 100, it doesn't unequip the tools.

I tried searching on the internet for the method to unequip and it is exactly the same with no errors whatsoever.

Everything works fine such as equipping tools, the Hotbar UI, the uis part, and the events.

game.StarterGui:SetCoreGuiEnabled(Enum.CoreGuiType.Backpack,false)

-- Tables and vars
local num = {

    '1',
    '2',
    '3',
    '4',
    '5',
    '6',
    '7',
    '8',
    '9',
}

local numinwords = {

    'One',
    'Two',
    'Three',
    'Four',
    'Five',
    'Six',
    'Seven',
    'Eight',
    'Nine',
}

local tools = {
    [1] = 'None' ,
    [2] = 'None' ,
    [3] ='None',
    [4] = 'None' ,
    [5] = 'None' ,
    [6] = 'None',
    [7] = 'None' ,
    [8] = 'None' ,
    [9] = 'None' ,

}

local uis = game:GetService('UserInputService')

local plr = game.Players.LocalPlayer

local backpack = game.Players.LocalPlayer:WaitForChild('Backpack')

local frame = script.Parent

repeat wait() until plr.Character

local char = plr.Character

wait(1)
for i, v in pairs(backpack:GetChildren()) do
    tools[i] = v
    frame[i].Image =  'rbxassetid://'..v.ID.Value

end
--Events
backpack.ChildAdded:Connect(function(tool)
    for i, v in pairs(tools) do

        if v == 'None' then
            frame[i].Image =  'rbxassetid://'..tool:WaitForChild('ID').Value
            tools[i] = tool
            break
        end
    end

    print(tools)

end)
backpack.ChildRemoved:Connect(function(tool)
    for i, v in pairs(tools) do
        if v == tool then
            if char:FindFirstChild(tool) then
            else
                tools[i] = 'None'
                frame[i].Image = ''
            end
            break
        end
    end

    print(tools)
end)


for i, v in pairs(frame:GetChildren()) do
    if v:IsA('ImageButton') then
        uis.InputBegan:Connect(function(input)
            local n = tonumber(v.Name)
            if input.KeyCode == Enum.KeyCode[numinwords[n]] then

                if tools[tonumber(v.Name)] ~= 'None' then

                    char.Humanoid:UnequipTools()
                    if char:FindFirstChild(tools[tonumber(v.Name)].Name) then
                        char.Humanoid:UnequipTools()

                    else

                        char.Humanoid:EquipTool(tools[tonumber(v.Name)])
                    end
                end
            end

        end)
    end
end


for i, v in pairs(frame:GetChildren()) do
    if v:IsA('ImageButton') then
        v.MouseButton1Click:Connect(function()
            if tools[tonumber(v.Name)] ~= 'None' then
                char.Humanoid:UnequipTools()
                if char:FindFirstChild(tools[tonumber(v.Name)].Name) then
                    char.Humanoid:UnequipTools()

                else

                    char.Humanoid:EquipTool(tools[tonumber(v.Name)])
                end
            end


        end)
    end
end