update

app/Notifications/PostCommentedNotification.php

@@ -24,6 +24,11 @@ class PostCommentedNotification extends Notification implements ShouldQueue
         return ['database'];
     }
 
+    public function databaseType(object $notifiable): string
+    {
+        return 'post_commented';
+    }
+
     public function toDatabase(object $notifiable): array
     {
         return [