Undefined array key "post_slug"

now i have two notifcation when a user comment on author post the author get notified and also when a author create a post they get point and get notified so think both notification are conflicting each other how can i resolve this please my code below

post create component

<?php

namespace App\Http\Livewire;

use App\Gamify\Points\PostCreated;
use App\Models\Category;
use App\Models\Post;
use App\Models\Tag;
use App\Models\User;
use App\Notifications\PointAdd;
use Illuminate\Support\Str;
use Livewire\Component;
use Illuminate\Http\Response;
use Livewire\WithFileUploads;

class PostCreate extends Component
{
    use WithFileUploads;
    public $post;
    public $users;
    public $body;
    public $slug;
    public $photo;
    public $title;
    public $category = 1;
    public $points = 10;
    public $energy = 1;

    public function increment()
    {
        $this->points++;
    }

    protected $rules = [
        'category' => 'required|integer|exists:categories,id',
        'title' => 'required|min:4',
        'body' => 'required|min:4',
    ];

    public function createPost()
    {
        if (auth()->check()) {
            $this->validate();
            $random =  str_pad(mt_rand(1,999999),6,'0',STR_PAD_LEFT);
            $post = Post::create([
                'user_id' => auth()->user()->id,
                'title' => $this->title,
                'category_id' => $this->category,
                'body' => $this->body,
                'post_number' => $random,
                'slug' => Str::slug($this->title) ?? null,
            ]);
                $users = auth()->user();
                $points = $users->givePoint(new PostCreated($post));
                $users->notify(new PointAdd($points));

                $image = $this->photo->storeAs('posts', str::random(30));
                $post->image = $image;
                $post->save();
                session()->flash("message", "Featured image successfully uploaded");

                preg_match_all('/(?<=#)(\w+)/mi', $this->body, $matchedTags, PREG_SET_ORDER, 0);
                foreach ($matchedTags as $matchedTag) {
                    if (!$tag = Tag::where('name', $matchedTag[0])->first()) {
                        $tag = tag::create(['name' => $matchedTag[0]]);
                    }
                    $post->tags()->attach($tag->id);
                    $tag->addEnergy(1);
                }

                preg_match_all('/(?<=@)(\w+)/mi', $this->body, $matchedMentions, PREG_SET_ORDER, 0);
                foreach ($matchedMentions as $matchedMention) {
                    optional(User::where('username', $matchedMention[0])->first(), function ($user) {
                        // $user->notify(new MentionsNotify($user));
                    });
                 }


            // $users = auth()->user();
            // $users->increment('points', 10);

            session()->flash('success_message', 'Post was added successfully!');

            $this->reset();

            return redirect()->route('post.index');
        }

        abort(Response::HTTP_FORBIDDEN);
    }




    public function upload()
    {
        $this->validate();


    }
    public function render()
    {
        return view('livewire.post-create', [
            'categories' => Category::all(),
        ]);
    }
}

point add notification

<?php

namespace App\Notifications;

use App\Models\Post;
use App\Models\User;
use Illuminate\Bus\Queueable;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Notifications\Messages\MailMessage;
use Illuminate\Notifications\Notification;

class PointAdd extends Notification
{
    use Queueable;
    public $users;
    public User $user;

    /**
     * Create a new notification instance.
     *
     * @return void
     */
    public function __construct(User $user)
    {
        $this->user = $user;
    }

    /**
     * Get the notification's delivery channels.
     *
     * @param  mixed  $notifiable
     * @return array
     */
    public function via($notifiable)
    {
        return ['mail', 'database'];
    }

    /**
     * Get the mail representation of the notification.
     *
     * @param  mixed  $notifiable
     * @return \Illuminate\Notifications\Messages\MailMessage
     */
    public function toMail($notifiable)
    {
        return (new MailMessage)
                    ->line('The introduction to the notification.')
                    ->action('Notification Action', url('/'))
                    ->line('Thank you for using our application!');
    }

    /**
     * Get the array representation of the notification.
     *
     * @param  mixed  $notifiable
     * @return array
     */
    public function toArray($notifiable)
    {
        return [
            'user_id' => $this->user->id,
            'user_name' => $this->user->name,
            'user_avatar' => $this->user->avatar,
            'user_points' => $this->user->reputation,
           
        ];
    }
}

comment component

<?php

namespace App\Http\Livewire;

use App\Models\Comment;
use App\Models\Movie;
use App\Models\Post;
use App\Notifications\NewComment;
use Illuminate\Http\Response;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\Notification;
use Livewire\Component;

class AddComment extends Component
{

    public $post;
    public $movie;
    public $comment;
    protected $rules = [
        'comment' => 'required|min:4',
    ];

    public function mount(Post $post)
    {
        $this->post = $post;
    }

    // public function mount(Movie $movie)
    // {
    //     $this->movie = $movie;
    // }


    public function addComment()
    {
        if (auth()->guest()) {
            abort(Response::HTTP_FORBIDDEN);
        }

        $this->validate();

        $comment = Comment::create([
            'user_id' => auth()->id(),
            'post_id' => $this->post->id,
            'movie_id' => $this->post->id,
            'body' => $this->comment,
        ]);

        $this->reset('comment');
        $this->post->user->notify(new NewComment($comment));
        $this->emit('commentWasAdded', 'Comment was posted!');
    }

    public function render()
    {
        return view('livewire.add-comment');
    }
}

Addcomment notification

<?php

namespace App\Notifications;

use App\Models\Comment;
use Illuminate\Bus\Queueable;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Notifications\Messages\MailMessage;
use Illuminate\Notifications\Notification;

class NewComment extends Notification
{
    use Queueable;

    /**
     * Create a new notification instance.
     *
     * @return void
     */
    public function __construct(Comment $comment)
    {
       $this->comment = $comment;
    }

    /**
     * Get the notification's delivery channels.
     *
     * @param  mixed  $notifiable
     * @return array
     */
    public function via($notifiable)
    {
        return ['mail','database'];
    }

    /**
     * Get the mail representation of the notification.
     *
     * @param  mixed  $notifiable
     * @return \Illuminate\Notifications\Messages\MailMessage
     */
    public function toMail($notifiable)
    {
        return (new MailMessage)
        ->subject('Tribe Creators: A comment was posted on your story')
        ->markdown('email.comment',[
            'comment' => $this->comment,
        ]);
    }

    /**
     * Get the array representation of the notification.
     *
     * @param  mixed  $notifiable
     * @return array
     */
    public function toArray($notifiable)
    {
        return [
            'comment_id' => $this->comment->id,
            'comment_body' => $this->comment->body,
            'user_avatar' => $this->comment->user->avatar,
            'user_name' => $this->comment->user->name,
            'post_id' => $this->comment->post->id,
            'post_slug' => $this->comment->post->slug,
            'post_title' => $this->comment->post->title,
        ];
    }
}

Notification blade to display all notifcation

div x-data="{ isOpen: false }"class="relative" >
    <button @click=
        "isOpen = !isOpen
        if (isOpen) {
            Livewire.emit('getNotifications')
        }
    ">
        <svg class="w-8 h-8 text-purple-500" viewBox="0 0 20 20" fill="currentColor">
            <path d="M10 2a6 6 0 00-6 6v3.586l-.707.707A1 1 0 004 14h12a1 1 0 00.707-1.707L16 11.586V8a6 6 0 00-6-6zM10 18a3 3 0 01-3-3h6a3 3 0 01-3 3z" />
        </svg>
        @if ($notificationCount)
            <div class="absolute flex items-center justify-center w-6 h-6 text-white bg-red-500 border-2 rounded-full text-xxs -top-1 -right-1">{{ $notificationCount }}</div>
        @endif
    </button>
    <ul
        class="absolute z-10 overflow-y-auto text-sm text-left text-gray-700 bg-white w-76 md:w-96 shadow-dialog rounded-xl max-h-128 -right-28 md:-right-12"
        x-cloak
        x-show.transition.origin.top="isOpen"
        @click.away="isOpen = false"
        @keydown.escape.window="isOpen = false"
    >
        @if ($notifications->isNotEmpty() && ! $isLoading)
            @foreach ($notifications as $notification)
            <li>
                <a
                    href="{{ route('post.show', $notification->data['post_slug']) }}"
                    {{-- @click.prevent="
                    @click.prevent="
                        isOpen = false
                    " --}}
                    "
                    wire:click.prevent="markAsRead('{{ $notification->id }}')"
                    class="flex px-5 py-3 transition duration-150 ease-in hover:bg-gray-100"
                >
                    <img src="{{ $notification->data['user_avatar'] }}" class="w-10 h-10 rounded-xl" alt="avatar">
                    <div class="ml-4">
                        <div class="line-clamp-6">
                            <span class="font-semibold">{{ $notification->data['user_name'] }}</span> commented on
                            <span class="font-semibold">{{ $notification->data['post_title'] }}</span>:
                            <span class="line-clamp-2">"{{ $notification->data['comment_body'] }}"</span>
                        </div>
                        <div class="mt-2 text-xs text-gray-500">{{ $notification->created_at->diffForHumans() }}</div>
                    </div>
                </a>
            </li>
            @endforeach
        <li class="text-center border-t border-gray-300">
            <button
                wire:click="markAllAsRead"
                @click="isOpen = false"
                class="block w-full px-5 py-4 font-semibold transition duration-150 ease-in hover:bg-gray-100"
            >
                Mark all as read
            </button>
        </li>
        @elseif ($isLoading)
            @foreach (range(1,3) as $item)
                <li class="flex items-center px-5 py-3 transition duration-150 ease-in animate-pulse">
                    <div class="w-10 h-10 bg-gray-200 rounded-xl"></div>
                    <div class="flex-1 ml-4 space-y-2">
                        <div class="w-full h-4 bg-gray-200 rounded"></div>
                        <div class="w-full h-4 bg-gray-200 rounded"></div>
                        <div class="w-1/2 h-4 bg-gray-200 rounded"></div>
                    </div>
                </li>
            @endforeach
        @else
            <li class="w-40 py-6 mx-auto">
                <img src="{{ asset('img/logo/no-posts.svg') }}" alt="No posts" class="mx-auto" style="mix-blend-mode: luminosity">
                <div class="mt-6 font-bold text-center text-gray-400">No new notifications</div>
            </li>
        @endif
    </ul>
</div>