Fixing @fastify/swagger Error: FST_ERR_PLUGIN_VERSION_MISMATCH

Published: 16 January 2023
on channel: Amjad CP

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Introduction:

In this video, we're going to show you how to fix the @fastify/swagger error: FST_ERR_PLUGIN_VERSION_MISMATCH. This error occurs when there is a version mismatch between the installed @fastify/swagger plugin and the version of Fastify you are using. We will go over the steps to resolve this issue so that you can get back to building your application.

Instructions:

1. Check the version of Fastify you are currently using by running the command npm list fastify.

2. Check the version of @fastify/swagger you are currently using by running the command npm list @fastify/swagger.

3. Compare the versions of Fastify and @fastify/swagger to ensure they are compatible.

4. If the versions are not compatible, update either Fastify or @fastify/swagger to a compatible version.

5. To update Fastify, run the command npm install fastify@latest (or the desired version number).

6. To update @fastify/swagger, run the command npm install @fastify/swagger@latest (or the desired version number).

7. Once the versions are updated and compatible, restart your application.

Note: Make sure you check the documentation of both packages to check the compatible version with each other.

Conclusion:

By following these steps, you should now be able to resolve the @fastify/swagger error: FST_ERR_PLUGIN_VERSION_MISMATCH and continue building your application. If you continue to experience issues, please reach out to the relevant support channels for further assistance.

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