Unsuccessfully updating Mongoose subdocument
You shouldn't need the findOneAndUpdate, as you already have the linkedItem when you do
const linkedItem = item.linkedItems.id(linkedItemId);So you could just set those properties and then use .save()
linkedItem.score = newAverageScore;linkedItem.currentNumberOfRatings = currentTotalNumberOfRatings;item.save(function(err, result){ console.log(err); console.log(result);});