Uniqueness of Chevalley bases for finite-dimensional modular Lie superalgebras

Let $p>2$, and let a finite-dimensional Lie algebra or Lie superalgebra have an indecomposable Cartan matrix normalized as in the source. A Chevalley basis uniqueness conjecture. There exists only one analogue of the Chevalley basis, up to signs. The claim concerns the uniqueness of integral-structure-constant bases in the modular setting; the supplied text gives no evidence resolving it.