Chari's conjecture for truncated local Weyl modules

Let $P^+$ be the dominant integral weights of $cmathfrak{sl}_n$, let $cmathcal{P}_{clambda}$ be the set of decompositions of $clambdain P^+$ into two dominant weights, and let $(clambda^{cmathrm{\max},1},clambda^{cmathrm{\max},2})$ be its unique maximal element. For $A=cmathbb C[t]/(t^2)$, let $W_0(clambda,2)$ denote the local Weyl module at the origin. Chari's truncated-local-Weyl conjecture. For any $a_1ne a_2incmathbb C$,

$$W_0(clambda,2)\cong V(clambda^{cmathrm{\max},1})_{a_1}cast V(clambda^{cmathrm{\max},2})_{a_2}.$$

This conjecture identifies the first nontrivial truncated local Weyl module with a two-factor fusion product and is stated as open in the supplied context.