Greece with City States can activate another city to avoid reducing the mood of a city that is activated a 2nd time. The warning, however, still says "City will become neutral". It should say something like "City will become neutral unless City States ability is used".
Given that you can undo your own moves, maybe the warning isn't that useful anyway, even for players without City States.
Greece with City States can activate another city to avoid reducing the mood of a city that is activated a 2nd time. The warning, however, still says "City will become neutral". It should say something like "City will become neutral unless City States ability is used".
Given that you can undo your own moves, maybe the warning isn't that useful anyway, even for players without City States.