Trying to change multiple pages to fetch data from a specified page by setting LinkType and PageShortcutLink but it throws an exception. How am I supposed to do it?

PageData page = DataFactory.Instance.GetPage(new PageReference(pageId));

page = page.CreateWritableClone();

page.LinkType = PageShortcutType.FetchData;
page.Property["PageShortcutLink"].Value = new PageReference(fetchId);

DataFactory.Instance.Save(page, EPiServer.DataAccess.SaveAction.Publish); 

Throws: The UPDATE statement conflicted with the FOREIGN KEY constraint "FK_tblWorkPage_tblPage1". The conflict occurred in database "EPiServerTest", table "dbo.tblPage", column 'pkID'.