URL Encryption | Change PageID > Message should show

Environment : Development
URL : http://40.124.26.81:81/dashboard
Login : cbuser

Replication steps :
1.Login with cbuser on dev environment.
2. Create document template > change page id
3. Update document page is opened
4.All page is blank,fill all the details > application throws server error
5.Also verified for other pages, if page id is changed user is redirecting to same page.

Expected : User should not redirect to Update document page or same page. proper message like "Page not found" should show.