"Cannot return null for non-nullable field" error

Sure…I’ve distilled it down a bit for use here, but it still throws the error.

Parse.Cloud.define('editItem', async (req) => {
  const { params: { input: { id, fields } } } = req;
  const itemQuery = new Parse.Query('Item');
  const item = await itemQuery.get(id);
  return item.save({ ...fields });
});