Вовсе не в платных/есплатны пользователях, в лж_меэнтенс по русский же написана проблема :) :
"Cluster maintenance
We're going to be taking the Chef Cluster offline while we rebuild the indices from its database. This should take care of the "Duplicate entry xxxxx-xxx for key 1" errors a lot of people have received today.

I'm disabling comments on this post for the time being."