Trace-field symmetry conjecture for $(-2,3,n)$ pretzel knots

Let $n$ be an odd, negative integer, and let the trace field of a hyperbolic knot complement mean its invariant trace field. Trace-field symmetry conjecture. The $(-2,3,n)$ and $(-2,3,6-n)$ pretzel knots have the same trace field. This symmetry would reduce the study of the trace fields to negative odd $n$; the source presents it as a conjecture and uses it to motivate the subsequent arguments, while the supplied text does not establish its resolution.