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Solved Gatsby error: Encountered duplicate defintitions for one or more documents: each document must have a unique name. Duplicated documents

Today when building a GatsbyJS site I got an error of 'Duplicated documents'. I got it when I ran gatsby build in my Git Bash terminal. Later I found the fix for this.

If you too got the same error, first look at this issue over gatsbyjs official repo, since that might help for some: https://github.com/gatsbyjs/gatsby/issues/11688

Solution in my case:

I struggled for some time with some tweaks, such as

Later when ran the build command in the command prompt, the site is successfully build.

Tip: Try running gatsby build in another terminal



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