Force Umbraco to update media tracking references

ReferencesController.cs

using System;
using System.Text;
using System.Web.Http;
using Umbraco.Core.Models;
using Umbraco.Web.WebApi;

namespace My.Controllers
{
	public class ReferencesController : UmbracoApiController
    {

		[HttpGet]
		public string Update()
		{
			var sb = new StringBuilder();

			var allContent = Services.ContentService.GetRootContent();
			foreach (var content in allContent)
			{
				SaveOrPublish(content, sb);
			}

			return sb.ToString();
		}

		private void SaveOrPublish(IContent content, StringBuilder sb)
		{
			try
			{
				if (content.Published)
				{
					Services.ContentService.SaveAndPublish(content, "*", content.WriterId, true);
				}
				else
				{
					Services.ContentService.Save(content, content.WriterId, true);
				}

				sb.AppendLine(content.Name);
			}
			catch (Exception ex)
			{
				sb.AppendLine(content.Name + " FAILED");
			}

			var children = Services.ContentService.GetPagedChildren(content.Id, 0, int.MaxValue, out long totalRecords);
			foreach (var child in children)
			{
				SaveOrPublish(child, sb);
			}
		}
    }
}