In the mentalist power system, they had a pretty similar term to cultivation deviation when you messed up. It was psyche recoil.
Previously, using the direct naming sense, it was called 'mental deviation'.
However, it became apparent that the word was being used for a derogatory purpose, and overlapping it with a serious phenomenon practitioners encountered was unsightly.
Therefore, it was later changed to psyche recoil.
A psyche recoil took place when a person incorrectly drew the shape mentioned in the practice technique while controlling their Spiritual Energy.
The margin of error allowed wasn't yet discovered, so people preferred to perfectly follow the shape.
Well, what happened if they didn't?
Poof.
Literally.
A part of their 'progress' would poof out of existence. It would vanish.
They would regress.
If a cultivation deviation 'halted' your progress, then psyche recoil 'regressed' your progress.
