Sometimes when you are editing a session, you may inadvertently alter something on the route level which will require you to save the route to a new route and attach your session to that. If that happens, save the new route and session and then fix it as follows:

1. Find the KUID or KUID2 of the route the session should be in.
2. Find the KUID of the route you have newly created.
3. Using content manager, clone the new session (Ctrl D)
4. In content manager, go to "open for edit".
5. Edit config.txt
6. In config.txt, search for all occurrences of the new route KUID and replace with the original route KUID
7. Save config.txt
8. Submit edits
9. Go back to the main menu and load the original route. Your new session should be there. If it's not, use content manager to look for your content. The session you edited might show with missing assets. Check the error and it will probably be you getting the KUID wrong. Open for edit, fix KUID and submit again.