Episerver: Update Modified Date for Usages of specific PageType

EpiServer.UpdateModifiedDate.cs

var contentRepo = ServiceLocator.Current.GetInstance<IContentRepository>();
var contentTypeRepo = ServiceLocator.Current.GetInstance<IContentTypeRepository>();
var contentType = contentTypeRepo.Load(typeof (PageData));

var usageRepo =
    ServiceLocator.Current.GetInstance<IContentModelUsage>()
        .ListContentOfContentType(contentType)
        .Select(x => x.ContentLink.ToReferenceWithoutVersion()).Distinct()
        .ToList();
            
foreach (var page in usageRepo.Select(usage => contentRepo.Get<PageData>(usage)).Where(page => !page.IsDeleted))
{
    try
    {
        EPiServer.Framework.ContextCache.Current[EPiServer.DataAccess.ContentSaveDB.UseIChangeTrackingSavedKey] = new object();

        var clone = page.CreateWritableClone();
        clone.Saved = clone.StartPublish;
        clone.Changed = clone.StartPublish;
        clone.SetChangedOnPublish = true;

        DataFactory.Instance.Save(clone, SaveAction.Publish | SaveAction.ForceCurrentVersion);
        //contentRepo.Save(clone, SaveAction.Publish, AccessLevel.Publish);
    }
    catch (Exception ex)
    {

    }
}