✅ EF: Instance of Entity Type cannot be tracked (already being tracked)

   private async Task SimulationLoop(CancellationToken cancellationToken)
   {
       using (var scope = Services.CreateScope())
       {
          [...]
           await SetAppTime(scope);
           using var db = scope.ServiceProvider.GetRequiredService<StockExchangeDb>();
           await CreateNews(db);
          [...]       
        }
   }
 private async Task CreateNews(StockExchangeDb db)
 {
     var tags = await db.Tags.AsNoTracking().ToListAsync();
     var distinctTags = tags.Distinct();
     var news = RandomCompanyNews.GetRandomNews(tags);
     Debug.WriteLine($"Creating news {news.Title}");
     var newsTags = news.NewsTags;
     news.NewsTags = new List<Models.NewsTag>();
     await db.News.AddAsync(news);
     await db.SaveChangesAsync();
     news.NewsTags = newsTags;
     foreach (var tag in news.NewsTags)
     {
         tag.NewsId = news.Id;
     }
     await db.SaveChangesAsync();
 }