{"Error":"An item with the same key has already been added. Key: cac567d40cb2f81e21f64c7d136c9fc6","StackTrace":"   at System.Collections.Generic.Dictionary\u00602.TryInsert(TKey key, TValue value, InsertionBehavior behavior)\n   at Bulev.Library.Products.BookmarksRepository.RemoveAsync(Sessions session, Int64 productid) in E:\\_disk c\\_work\\_projects\\ZigZagDom\\Bulev.Library.Products\\Bulev.Library.Products\\Repositories\\BookmarksRepository.cs:line 86\n   at Bulev.Library.Products.BookmarksIM.Remove(BaseController controller) in E:\\_disk c\\_work\\_projects\\ZigZagDom\\Bulev.Library.Products\\Bulev.Library.Products\\Models\\Bookmarks.cs:line 63"}