xshockz

The (1) and (2) are probably just the index of the array. You can't use that.

If you're not using mongoosejs (which automatically casts the string into ObjectId) then you'd have to cast the string into an ObjectId.
 

const idToDelete = '5dcc20c3770b9707143301fb'

// if not using mongoose
collection.deleteOne({_id: new mongodb.ObjectID(idToDelete)}, callback};

// if using mongoose > 4 (deleteOne isn't supported on mongoose 4 or higher)
collection.findByIdAndRemove({_id: idToDelete}, callback);

references:
https://docs.mongodb.com/manual/reference/method/db.collection.deleteOne/
https://mongoosejs.com/docs/api.html#model_Model.findByIdAndRemove