Duplicated Meta tags?

This is a "feature" of vue-meta, please take a look at the documentation of head elements.

To avoid any duplication when used in child component, please give a unique identifier with the hid key. Learn more.

For the meta description, you need to add the unique identifier hid so vue-meta will know that it has to overwrite the default tag.

Your nuxt.config.js:

...head: {
    title: 'starter',
    meta: [
      { charset: 'utf-8' },
      { name: 'viewport', content: 'width=device-width, initial-scale=1' },
      { name: 'keywords', content: 'keyword 1, keyword 2'},
      { hid: 'description', name: 'description', content: 'This is the generic description.'}
    ],
  },
...

And then in your individual page:

export default {
  head () {
    return {
      title: `Page 1 (${this.name}-side)`,
      meta: [
        { hid: 'description', name: 'description', content: 'Page 1 description' }
      ]
    }
  }
}