如何防止以下Vue Watch触发无限循环?

visitorInfo: {
  name: {
    name: 'Name',
    value: '',
    isInvalid: false,
    errors: []
  },
  email: {
    name: 'Email address',
    value: '',
    validation: {
      isRequired: true
    },
    errors: []
  },
  phone: {
    name: 'Phone number',
    value: '',
    errors: []
  }
},

我在用 value fields

fields: {
  handler (fields) {
    Object.entries(fields).forEach(([key, value]) => {
      const field = fields[key]
      const isRequired = field.validation.isRequired && field.value
      if (isRequired) {
        field.errors.push({
          errorType: 'isRequired',
          message: 'This field is required.'
        })
      }
    })
  },
  deep: true
}

field.errors.push({
  errorType: 'isRequired',
  message: 'This field is required.'
})

会触发一个无休止的LOP,因为它正在修改

如何解决这个问题?