If they can't speak for themselves and they don't have family members or next of kin who can speak for them, the common thing to do, in medicine in any case, if you do make a mistake and you realize you have made a mistake, is to disclose that mistake as soon as you can, to rectify it. In that situation I don't think it's life-threatening or whatever. I don't think it's the end of the world.
On May 2nd, 2019. See this statement in context.