Cannot link directly to doc in sidebar

🐛Cannot link directly to doc in sidebar

I am trying to link to a doc directly in the sidebar per the v2 documentation.

To Reproduce

(Write your steps here:)

1. Add doc link in sidebars.js code

module.exports = {
  docs: [
    {
      type: "category",
      label: "Get Started",
      items: ["get_started"]
    },
    { 
     type: "doc",
     id: "api"
    }
  ]
};

1. Run npm run start

Expected behavior

No compile errors, we see the link directly to the doc in the sidebar.

Actual Behavior

It will not compile, see this error in console:

Error: Unknown sidebar item keys: id. Item: {"type":"doc","id":"api"}

[endiliey]

See https://github.com/facebook/docusaurus/pull/2032

[endiliey]

Thank you. We’ll warn it to user better in #1994