Cannot query field "langKey"

[joaorsfonseca]

GraphQLError: Cannot query field "langKey" on type "MarkdownRemarkFields".

I'm trying to use gatsby-plugin-i18n with gatsby-transformer-remark but i'm getting the error above.

    {
      resolve: 'gatsby-plugin-i18n',
      options: {        
        langKeyDefault: languages.defaultLangKey,
        useLangKeyLayout: false, 
        // prefixDefault: true,
        markdownRemark: {
          postPage: 'src/templates/kb-post.js',
          query: `
          {
              allMarkdownRemark {
                  edges {
                  node {
                      fields {
                      slug,
                      langKey
                      }
                  }
                  }
              }
          }
          `
        }
      }
    },

My folder structure looks like this:
|-- contents
|---|-- network
|---|-- projects
|---|---|-- open-project.en.md
|---|---|-- open-project.en.pt
|-- src
|---|-- component
|---|-- templates
|---|---|-- kb-post.js
|-- gatsby-config.js

Any tips?
Code available here

Thanks.

[mccrodp]

Looks like you're using Gatsby v2. This starter only got to Gatsby v1. There are a few changes in v2 and I never needed this starter, so never upgraded. I suggest to start from the v2 starter: https://github.com/angeloocana/gatsby-plugin-i18n/tree/master/packages/gatsby-starter-default-i18n

If you want to reference another one that was upgraded, I upgraded this one with Contentful CMS, so it might point you in the right direction also: https://github.com/mccrodp/gatsby-starter-contentful-i18n