Value changing when player touches a part system only working one time ?

I want to make a system where if a player touches a specific part, then a value in it would change to true if not already, i have this script in the part :

local part = script.Parent
part.Touched:Connect(function(hit)
    print("Touched")
    if hit then
        if hit.Parent:FindFirstChild("Humanoid") then
            print("An humanoid Touched")
            local p = game.Players[hit.Parent.Name]
            print(hit.Parent.Name)
            local s = p:FindFirstChild("IsTouched")
            if s then
                print("Value found")
                print("Changing....")
                s.Value = true
                print("Changed!")
            end
        end
    end
end)

It work only one time and when i try a second time it doesn't

When i change the value manualy it works

it prints out everything on every tries i've made, even if the value does not change

Thanks for futur answers!