pg node (postgres) UPDATE statement returns column does not exist when it does exist - node.js

Question

In pgAdmin/the cli, the following query:
UPDATE wq SET l_id = NULL, v_id = NULL WHERE w_id = 'cf93bc71-88c1-4bba-9e5c-fdc58d0ed14e';
works fine. However, when calling the same with the pg package in node:
const w_id_val = 'cf93bc71-88c1-4bba-9e5c-fdc58d0ed14e';
/*
(here client is the result of calling const pool = pg.Pool({...}) ,
then let client = await pool.connect());
*/
const result = await client.query(
`UPDATE wq
SET l_id = null,
v_id = null
WHERE w_id = $1`,
[w_id_val]
);
I get the following error:
{
"message":"column \"w_id\" does not exist",
"stack":"error: column \"w_id\" does not exist\n at Connection.parseE (/Users/lukasjenks/Documents/Work/socrative-nodejs/node_modules/pg/lib/connection.js:569:11)\n at Connection.parseMessage (/Users/lukasjenks/Documents/Work/socrative-nodejs/node_modules/pg/lib/connection.js:396:17)\n at Socket.<anonymous> (/Users/lukasjenks/Documents/Work/socrative-nodejs/node_modules/pg/lib/connection.js:132:22)\n at Socket.emit (events.js:314:20)\n at Socket.EventEmitter.emit (domain.js:483:12)\n at addChunk (_stream_readable.js:297:12)\n at readableAddChunk (_stream_readable.js:272:9)\n at Socket.Readable.push (_stream_readable.js:213:10)\n at TCP.onStreamRead (internal/stream_base_commons.js:188:23)\n at TCP.callbackTrampoline (internal/async_hooks.js:126:14)",
"name":"error",
"length":112,
"severity":"ERROR",
"code":"42703",
"position":"68",
"file":"parse_relation.c",
"line":"3514",
"routine":"errMissingColumn"
}
I can confirm the column exists with this query:
SELECT table_schema, table_name, column_name, data_type
FROM information_schema.columns
WHERE table_name = 'wq';
public wq id uuid
public wq w_id uuid
public wq l_id uuid
public wq v_id uuid
I can also confirm that the column (w_id) should be recognized by pg as when using pg to query the table with a SELECT statement, I get this back in the fields property in the result object returned:
fields: [
Field {
name: 'id',
tableID: 26611,
columnID: 1,
dataTypeID: 2950,
dataTypeSize: 16,
dataTypeModifier: -1,
format: 'text'
},
Field {
name: 'w_id',
tableID: 26611,
columnID: 3,
dataTypeID: 2950,
dataTypeSize: 16,
dataTypeModifier: -1,
format: 'text'
},
...
I've also confirmed this isn't a case issue; i.e. the column name is all lowercase and using double quotes around the column name has no effect.