I am having a bit of trouble getting this to work. ```js await db .insert(schema.listings) .values(listings) .onConflictDoUpdate({ target: schema.listings.SKU, set: { SKU: sql`CONCAT(EXCLUDED.${schema.listings.SKU.name}, '-duplicate')`, }, }); ``` Error I get ``` Uncaught (in promise) PostgresError: syntax error at or near "$601" ```