AddLiquidityV2.query - proportional fails for WeightedPool2Tokens

[mkflow27]

The sdk builds userData with the below fn. However for WeightedPool2Tokens, proportional joins do not exist. Therefor the query reverts, when the userData is being decoded on the smart contracts.

static addLiquidityProportional = (bptAmountOut: bigint): Hex => {
        return encodeAbiParameters(
            [{ type: 'uint256' }, { type: 'uint256' }],
            [
                BigInt(WeightedPoolJoinKind.ALL_TOKENS_IN_FOR_EXACT_BPT_OUT),
                bptAmountOut,
            ],
        );
    };