How do you make an inventory system that goes well with a running system?

So in my game there is an inventory system and a running system. The problem I'm having with this is that when I open the inventory I can reset my speed. I tried to fix it but now when I exit the inventory I can't move at all.

This is my script.

local Mouse = game.Players.LocalPlayer:GetMouse()

local RunGUI = script.Parent.RunGUI.RunText

RunGUI.BackgroundColor3 = Color3.new(.100,.100,.100)

InInventory = false






Mouse.KeyDown:Connect(function(key)

    if key:lower() == "0" or key:upper() == "0" then

        if InInventory == false then

        game.Players.LocalPlayer.Character.Humanoid.WalkSpeed = game.Players.LocalPlayer.Character.Humanoid.WalkSpeed * 1.35

        RunGUI.BackgroundColor3 = Color3.new(.0,.3,.7)

        end

    end

end)


Mouse.KeyUp:Connect(function(key)

    if key:lower() == "0" or key:upper() == "0" then

        if InInventory == false then

        game.Players.LocalPlayer.Character.Humanoid.WalkSpeed = 16 -- [+ (any future Gamepasses or something like that)]

        RunGUI.BackgroundColor3 = Color3.new(.100,.100,.100)

        end

    end

end)



Mouse.KeyDown:Connect(function(key2)

    if key2:lower() == "e" or key2:upper() == "E" then

        game.Players.LocalPlayer.Character.Humanoid.WalkSpeed = 0

        InInventory = true

    end

end)





Mouse.KeyDown:Connect(function(input)


    if input:lower() == "e" or input:upper() == "E" then


        game.Players.LocalPlayer.Character.Humanoid.WalkSpeed = 16


    end

end)

The inventory script is somewhere else but it has nothing to do with running and couldn't affect the run script.

If anyone knows how to fix this, please help.