Rocket.Chat/server/startup/migrations/v235.ts

import { Migrations } from '../../../app/migrations/server';
import { Settings, Subscriptions, Users } from '../../../app/models/server';

Migrations.add({
	version: 235,
	up() {
		Settings.removeById('Accounts_Default_User_Preferences_audioNotifications');

		// delete field from subscriptions
		Subscriptions.update({
			audioNotifications: {
				$exists: true,
			},
		}, {
			$unset: {
				audioNotifications: 1,
				audioPrefOrigin: 1,
			},
		}, { multi: true });

		Subscriptions.tryDropIndex({ audioNotifications: 1 });

		// delete field from users
		Users.update({
			'settings.preferences.audioNotifications': {
				$exists: true,
			},
		}, {
			$unset: {
				'settings.preferences.audioNotifications': 1,
			},
		}, { multi: true });
	},
});