Hall of Fame

[nonplayer]

do not never ever change your permalink base to /:name at first path.. use /:id/:name/
if you use /:name at first path for page/post/article permalink then login page and user will give 404 not found response after that one sky will fall on your head.

if you accidentally change it, you need to edit it on your database. "vibe_options" tables
after you revert it just delete any cached pages on cache/ directory (just delete .cache files eg. b93c93a8c598858e244d612674412d8.cache)

next reload your browser 
sorry for my bad english.

[Marius]

Hey! Yes, id-s are mandatory But you can edit them under permalink settings back to normal.