Princess posted today that the list was caused by human error and the person responsible was no longer there.
Well, that's not quite precise. Princess said that they have made "the appropriate personnel changes" without amplification as to the meaning of that phrase. It may well mean that the deck officer who did the wrong thing has simply been reassigned to other duties onboard pending further training.
The line posted a letter to passengers
explaining the mishap in the "Press Release" section of the web site.