Express Postgresql

下記のコードを実行するとエラーが発生します。

async function UpdateUser(uid, data) {
  console.log(uid);
  const sql = "UPDATE USERS name = $1 WHERE uid = $2";
  const values = [data.name, uid];
  const client = await pool.connect();
  await client.query(sql, values);
  client.release();
  process.on('unhandledRejection', console.dir);
  return 1;
}

] (node:29148) UnhandledPromiseRejectionWarning: error: syntax error at or near "="
[1]     at Connection.parseE (/Users/user/work/enjoy/node_modules/pg/lib/connection.js:600:48)
[1]     at Connection.parseMessage (/Users/user/work/enjoy/node_modules/pg/lib/connection.js:399:19)
[1]     at Socket.<anonymous> (/Users/user/work/enjoy/node_modules/pg/lib/connection.js:115:22)
[1]     at Socket.emit (events.js:210:5)
[1]     at addChunk (_stream_readable.js:308:12)
[1]     at readableAddChunk (_stream_readable.js:289:11)
[1]     at Socket.Readable.push (_stream_readable.js:223:10)
[1]     at TCP.onStreamRead (internal/stream_base_commons.js:182:23)
[1] (node:29148) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)

sqlのところはselectとかcreateは通るのですが、UPDATEでエラーが発生します。
なぜ、このようなエラーが発生するのでしょうか？