I stumbled into past life adjustment quite accidentally. It's not something I read about or heard about from any source on shamianism. It's something my spirit animals and I put together on the fly. It was quite exciting and my strangest and most exciting journey so far. It illustrates two important points of shamanism: innovate and trust your spirit animals.
The person involved, who I did other shamanic journeys for, said this journey was the most healing journey of all.