Mental regression techniques have apparently been used since the 1950s to enable the expression of memories of "past lives" (by hypnotherapists and psychotherapists).
This may stem from past lives of the current life, or from difficult passages in life that “block” us in one way or another.
Regression can be performed under hypnosis, but also while relaxed or in a light trance.
In coaching, all you need is to be relaxed… (I speak from experience).
and for light regression trance… or outright hypnosis…
Source: “Encyclopedia of Alternative Medicine” Mondo Editions (Switzerland)
This aligns with what Rolande explained to us in her other messages.