CMS cms "edit" front page link broken
 

I've somehow broken the edit link on my cms front page. The link is now:

http://.../content.php/edit

and errors out as:

Code:
Invalid route

The page that you have requested was not found. If you followed a valid link, please notify the administrator
The other cms pages edit links work fine, so if I manually type in what I think the edit link addy should be it works:

http://.../content.php?5-the-front-page/edit

How can I fix this broken edit link?