ailed to execute message; mwithdraw ustc failed ,essage index: 0: dispatch: submessages: Generic error: Querier system error: Unsupported query type: unknown terra query variant:

[mnuestc]

hey guys， i want to use this script to withdraw ustc from aust， using flowing script：，but it throw error message: "failed to execute message; message index: 0: dispatch: submessages: Generic error: Querier system error: Unsupported query type: unknown terra query variant: execute wasm contract failed [CosmWasm/[email protected]/x/wasm/keeper/keeper.go:429] With gas wanted: '1000000000' and gas used: '514492' "
could you help me to see how to solve this？

import { LCDClient, MnemonicKey, RawKey, MsgExecuteContract, Wallet } from '@terra-money/terra.js';
async function withDraw(wallet: Wallet) {
const execute = new MsgExecuteContract(
wallet.key.accAddress, // sender
"terra1hzh9vpxhsk8253se0vv5jj6etdvxu3nv8z07zu", // aUst contract
{
"send": {
"msg": "eyJyZWRlZW1fc3RhYmxlIjp7fX0=",
"amount": "1000000000",
"contract": "terra1sepfj7s0aeg5967uxnfk4thzlerrsktkpelm5s"
}
},
{ uluna: 1000000 } // coins
);

const executeTx = await wallet.createAndSignTx({
  msgs: [execute],
});

const executeTxResult = await client.tx.broadcastSync(executeTx);
console.log(executeTxResult);

}