Yup schema validation password and confirmPassword doesn't work

import * as Yup from 'yup';
import User from '../models/User';

class UserController {
async store(req, res) {
const schema = Yup.object().shape({
  name: Yup.string().required(),
  email: Yup.string()
    .email()
    .required(),
  password: Yup.string()
    .required()
    .min(6),
});

if (!(await schema.isValid(req.body))) {
  return res.status(400).json({ error: 'Validation fails' });
}

const userExists = await User.findOne({ where: { email: req.body.email } });
if (userExists) {
  return res.status(400).json({ error: 'User already exists.' });
}
const { id, name, email, provider } = await User.create(req.body);
return res.json({ id, name, email, provider });
}

async update(req, res) {
const schema = Yup.object().shape({
  name: Yup.string(),
  email: Yup.string().email(),
  oldPassword: Yup.string().min(6),
  password: Yup.string()
    .min(6)
    .when('oldPassword', (oldPassword, field) =>
      oldPassword ? field.required() : field
    ),
  confirmPassword: Yup.string().when('password', (password, field) =>
    password ? field.required().oneOf([Yup.ref('password')]) : field
  ),
});

if (!(await schema.isValid(req.body))) {
  return res.status(400).json({ error: 'Validation fails' });
}

const { email, oldPassword } = req.body;
const user = await User.findByPk(req.userId);
if (user.email !== email) {
  const userExists = await User.findOne({
    where: { email },
  });
  if (userExists) {
    return res.status(400).json({ error: 'User already exists.' });
  }
}

if (oldPassword && !(await user.checkPassword(oldPassword))) {
  return res.status(401).json({ error: 'Password does not match.' });
}

const { id, name, provider } = await user.update(req.body);

return res.json({ id, name, email, provider });
  }  
}
export default new UserController();

Here it creates a normal user with the password 123456:

Here it should work, since the old password is the same as the password of the created user, and it should update the new password:

I want to try to understand how to make him understand the current password as oldpassword and update the password.

Try this out:

import * as Yup from 'yup';

validationSchema: Yup.object({
  password: Yup.string().required('Password is required'),
  passwordConfirmation: Yup.string()
     .oneOf([Yup.ref('password'), null], 'Passwords must match')
});