The linearizable generation conjecture for polynomial automorphism groups

Let $\mathbb{K}$ be a field and let $n$ denote the number of variables. A polynomial automorphism is linearizable if it can be transformed into a linear automorphism by a polynomial change of coordinates. Linearizable generation conjecture. The group

$$\operatorname{GA}_n(\mathbb{K})$$

is generated by all linearizable automorphisms. The source gives this as another conjecture concerning generating sets of polynomial automorphism groups; it does not provide a resolution in the supplied text.