fast json schema issues

issue.js

const compile = require("fast-json-stringify");

const schema = {
  type: 'array',
  items: {
    type: "object",
    anyOf: [
      {
        type: 'object',
        required: [ 'id', 'createdAt', 'author', 'type', 'body' ],
        properties: {
          id: { type: 'string' },
          createdAt: { type: 'string', format: 'date-time' },
          author: {
            type: 'object',
            required: [ '_id', 'fullName' ],
            properties: { _id: { type: 'string' }, fullName: { type: 'string' } },
            additionalProperties: false
          },
          type: { type: 'string', enum: [ 'Text' ] },
          body: { type: 'string' }
        },
        additionalProperties: false
      },
      {
        type: 'object',
        required: [ 'id', 'createdAt', 'author', 'type', 'status' ],
        properties: {
          id: { type: 'string' },
          createdAt: { type: 'string', format: 'date-time' },
          author: {
            type: 'object',
            required: [ '_id', 'fullName' ],
            properties: { _id: { type: 'string' }, fullName: { type: 'string' } },
            additionalProperties: false
          },
          type: { type: 'string', enum: [ 'StatusTransition' ] },
          status: {
            type: 'string',
          }
        },
        additionalProperties: false
      }
    ]
  }
}


const stringify = compile(schema);
console.log(stringify([
  {
    type: "StatusTransition",
    id: 1,
    createdAt: new Date().toISOString(),
    status: "bla",
    author: {
      _id: 2,
      fullName: "John Doe"
    }
  }
]))