Is it possible in mongoose schema to know which field is being updated?

Question

Mongoose

It is necessary to create conditions in which the field was deleted when updating the fields of the document.
For example, there are 3 fields in the document

{
 p1:	{ type: String }
 p2:	{ type: String }
 p3:	{ type: String }
}

If p1 or p2 is updated during the update method, then the p3 field must be deleted

schema.pre('update', function(next) {
    this.updateOne({},{ $unset: { p3: !0 } })
    next()
})

Or is it not realistic to find out? And you have to do everything directly in the handler?