You can set up automatic redirection from one Wiki page to another. In this case, you won't be able to edit the original page until you remove the redirect.
To enable redirection:
In the top right corner of the page, click → Settings.
Under Redirection, enter the address of another page.
Click Save.
Removing a redirect
To disable redirection to another page:
First, open the address of the original page.
After being redirected, click the link in the notification with the text You were redirected from.
In the notification on the original page, click Restore.