Why does it say "Value is not a valid member of Model", etc. in out put?

Why does it say in output: "17:13:42.515 - Value is not a valid member of Model", "17:13:42.515 - Script 'Workspace.Player1.StarterSword.Handle.LocalScript', Line 13", and "17:13:42.515 - Stack End". The NPC has the value inside of him. How can I fix this?

local debounce = false
local player = game.Players.LocalPlayer

function onTouched(hit)
    if not debounce then
        debounce = true
        if hit.Parent.Name:sub(1,17) == "AFK Noob Lv 1 HP " then
            hit.Parent.Humanoid.Health = hit.Parent.Humanoid.Health - 25
            if hit.Parent.Humanoid.Health == 0 then
                if hit.Parent.Value == false then 
                    player.leaderstats.EXP.Value = player.leaderstats.EXP.Value + 16 
                end
                hit.Parent.Value = true
            end
            wait(0.5)
            debounce = false
        elseif hit.Parent.Name:sub(1,4) == "Noob" then
            hit.Parent.Humanoid.Health = hit.Parent.Humanoid.Health - 25
            wait(0.5)
            debounce = false
        end
    end
end

script.Parent.Touched:connect(onTouched)