If your are using Wordpress you might have run into the following situation. Let's say the main usage of this particular Wordpress installation is not so much blogging (articles), but as light-weight CMS (pages). Wordpress' Page and Subpage system works quite well in this respect, but I am no happy with one thing: Numbers as Page Slugs.

While it's possible to create a new page, name it with a number "2012", the page slug automatically turns to 2012-2. Manually editing the page slug back to "2012" and publishing it should solve that. Unfortunately not. Back to "2012-2".

In most cases, when the page slug is not a number, the presence of a "-2" and the end of the slug suggests, that the page already exists in the database. Make sure it's not in the Trash, empty the trash, if it is.

trembl.org/2012/

It does not seem to be a huge problem, because even when the page slug is "2012-2" and you ask for a page named trembl.org/2012/, Wordpress will happily forward (redirect?) you to trembl.org/2012-2/. So... Working: Yes? Nice solution: No!.

No other choice than to have a look at the MySQL itself. If you are not comfortable doing it on the CL, have a look at phpMyAdmin. Actually, if you are not comfortable editing MySQL, don't do it at all. Messing up the MySQL will mess up you Wordpress installation! And I assume you have a recent backup.

So, with that out of the way, open your Wordpress MySQL DB in phpMyAdmin. The wp_posts table holds all your posts, pages, as well as all the revisions to them. Look for the one you want to edit, in this case "2012-2". Open the entry for editing (the small crayon on the left). You'll want to edit "post_name". Change it to whatever you live ("2012"), save (it's called "Go") and you're done.

Wordpress Version: 3.1.3