Rocket.Chat/server/startup/migrations/v031.js

RocketChat.Migrations.add({
	version: 31,
	up() {
		const changes = {
			API_Analytics: 'GoogleTagManager_id'
		};

		for (const from of Object.keys(changes)) {
			const to = changes[from];
			const record = RocketChat.models.Settings.findOne({
				_id: from
			});

			if (record) {
				delete record._id;
				RocketChat.models.Settings.upsert({
					_id: to
				}, record);
			}

			RocketChat.models.Settings.remove({
				_id: from
			});
		}
	}
});