Prevent multiple slugs from being the same

Hi guys, i'm currently working on building a blog using payload. I've just implemented a hook for formatting the title and setting it as a slug like so

export const formatSlug: FieldHook = async ({ value, data }) => {
  return data?.title?.replace(/ /g, '-').toLowerCase() ?? value
}

    {
      name: 'slug',
      type: 'text',
      hooks: {
        beforeChange: [formatSlug],
      },
      label: 'The slug is automatically generated from the title.',
      admin: {
        readOnly: true,
      },
    },

But this has the potential to create two slugs the same (if for whatever reason the title of the blog post is repeated) - Is there anyway to prevent his happening?