this may be a bit of a far-fetched hypothesis, but maybe the song name "the shamans trance", if it has in fact been changed, was dismissed as it could be a form of drug reference.
shamans have been known to utilize or advocate the use of psychoactive drugs, notably psilocyben mushrooms and dimethyltryptamine (DMT, from native plants, leaves etc.) in order to "discover" one's self and their place in nature (or something like that
). In this psychoactive state, a shamans chant is utilized to help induce a particular state of mind under the influence of these substances.
Maybe the potential allusion of drug-use could be a reason to change the name?