Netrebko in Trouble

Here is an interesting story. Anna Netrebko has cancelled her appearance at the Opera Ball in Vienna because her name appeared in a list.

She is in trouble for interfering in the affairs of another country.  Because she's an Austrian citizen.  Forgive me if my memory has failed me, but I remember that she agreed to become an Austrian citizen only if she was not required to renounce Russian citizenship.  Maybe I've gone daft.  If she's still a Russian citizen, shouldn't she get to have opinions about Russian politics?