Why can not I move / rename this page?

I'd like to rename it to General Assembly instead of AG and it's not working for me. I could do that for the 2011 page though. Only visible difference at the moment is that this one is categorized and the other was not.

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Martin (talk)‎20:50, 30 January 2015

I don't know. It's not protected.

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Kwisatz (talk)‎21:33, 30 January 2015

Ok, so it was protected in the end

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Kwisatz (talk)‎12:46, 31 January 2015