Does a man divorce his wife if he mistakenly addresses a non-mahram woman, believing her to be his wife, and says, 'You are divorced'?

Primary text

If a man encounters a non-mahram woman, mistakes her for his wife, and declares, 'So-and-so, you are divorced,' his actual wife is divorced. This position is stated by Ahmad. The reasoning is that he intended the divorce to apply to his wife via the utterance of divorce, thus it takes effect. This is analogous to a situation where he knew she was a non-mahram woman but intended the divorce to apply to his wife.