Laravel Observer handle events twice

Question

In my laravel app I want to save histories of all actions (create,update,delete), to do this, I create histories table and I observe all Models and store in histories table on every event handled,
But, when I handle the User updated event. for exemple, two row was saved on histories table, also when I handel the User created event. even with ing events.

N.B : I store user with create() method and I update it with update() method

UserObserver :

/**
     * Handle the User "created" event.
     */
    public function created(User $user): void
    {
        $user_resource =(new UserResource($user))->toResponse(request());
   
        $history = History::create([
            'model_type' => User::class,
            'model_id' => $user->id,
            'action' => 'create',
            'action_date' => now(),
            'model_object' => $user_resource->content(),
            'user_id' => request()->user()->id,
        ]);
    }

    /**
     * Handle the User "updated" event.
     */
    public function updated(User $user): void
    {
        $user_resource =(new UserResource($user))->toResponse(request());
        $history = History::create([
            'model_type' => User::class,
            'model_id' => $user->id,
            'action' => 'update',
            'action_date' => now(),
            'model_object' => $user_resource->content(),
            'user_id' => request()->user()->id,
        ]);
        // dd($history);

    }

When I delete this lines :

/**
     * Handle the User "updated" event.
     */

no data was stored in histories table. I don't know the interst of this commented line and if thine lines handle the event twice

Answer 1

The issue is that I define the UserObserver twice in EventServiceProvider