I was reading up on prototypes and constructor functions in Javascript and came across the snippet below on MDN:

const personPrototype = {
  greet() {
    console.log(`hello, my name is ${this.name}!`);
  }
}

function Person(name) {
  this.name = name;
}

Person.prototype = personPrototype;
Person.prototype.constructor = Person;

What I am confused about is the last line: setting the constructor property within Person.prototype to the Person constructor. Here is MDN's explanation:

The last line (Person.prototype.constructor = Person;) sets the prototype's constructor property to the function used to create Person objects. This is required because after setting Person.prototype = personPrototype; the property points to the constructor for the personPrototype, which is Object rather than Person (because personPrototype was constructed as an object literal).

When I run this code in my console without the last line, there doesn't seem to be any errors. I am confused about why the Person.prototype.constructor must be set to Person and not left as the default Object. Does it have something to do with instances created by Person? Thanks.