Coding⏱️ 3 min read📅 2026-06-04

How to Fix: Error when deploying react app and it keeps sayings << Plugin "react" was conflicted between "package.json » eslint-config-react-app » >>

Plugin "react" was conflicted between "package.json " eslint-config-react-app ">, resolve by deleting node_modules and running npm install and npm start again.

Quick Answer: Delete node_modules, run npm install and npm start to resolve the conflict.

📋 Table of Contents

  1. 🛑 Root Causes of the Error
  2. 🛠️ Step-by-Step Verified Fixes
  3. 🎯 Final Words

Error Message: 'Plugin "react" was conflicted between "package.json' eslint-config-react-app>>'

This error occurs when there is a conflict between the installed `react` package and the `eslint-config-react-app` configuration in your project's `package.json` file. It can be frustrating for developers who are new to React and npm, as it prevents them from successfully compiling their application.

🛑 Root Causes of the Error

  • The main reason for this error is that there are multiple versions of the `react` package installed in the project.
  • Another possible cause is that the `eslint-config-react-app` configuration in the `package.json` file is not properly configured or is outdated.

🛠️ Step-by-Step Verified Fixes

Resolving Conflicting Versions of React

  1. Step 1: Step 1: Uninstall the conflicting version of React using npm by running the command `npm uninstall react`. This will remove any existing installations of React from the project.
  2. Step 2: Step 2: Install the latest version of React using npm by running the command `npm install react@latest`. This will ensure that you have the most recent version of React installed in your project.
  3. Step 3: Step 3: Verify that the conflict has been resolved by checking the package.json file and ensuring that there are no longer any conflicting versions of React.

Updating eslint-config-react-app Configuration

  1. Step 1: Step 1: Update the `eslint-config-react-app` configuration in the `package.json` file to the latest version using npm by running the command `npm install eslint-config-react-app@latest`. This will ensure that your project is configured to use the most recent version of React.
  2. Step 2: Step 2: Verify that the conflict has been resolved by checking the package.json file and ensuring that there are no longer any conflicting versions of React.

🎯 Final Words

To resolve this error, you can try either resolving conflicting versions of React or updating the `eslint-config-react-app` configuration in your project's `package.json` file. By following these steps, you should be able to successfully compile your React application and avoid this error message.

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