YARN warning "has unmet peer dependency". What do with this? - reactjs

Question

Warning in console:
warning "react-scripts > eslint-config-react-app > eslint-plugin-flowtype#8.0.3" has unmet peer dependency "#babel/plugin-syntax-flow#^7.14.5".
warning "react-scripts > eslint-config-react-app > eslint-plugin-flowtype#8.0.3" has unmet peer dependency "#babel/plugin-transform-react-jsx#^7.14.9".
warning " > #testing-library/user-event#13.5.0" has unmet peer dependency "#testing-library/dom#>=7.21.4".
This warning appears when I install or remove packages. I don't know what I need to do with this.
Yarn version:
$ yarn -v
1.22.17
Dependencies in package.json:
"dependencies": {
"axios": "^0.24.0",
"dotenv": "^10.0.0",
"mobx": "^6.5.0",
"mobx-react-lite": "^3.3.0",
"node-sass": "^7.0.1",
"react": "^17.0.2",
"react-dom": "^17.0.2",
"react-dropzone": "^12.0.4",
"react-hook-form": "^7.29.0",
"react-id-swiper": "^4.0.0",
"react-router-dom": "^6.2.1",
"react-scripts": "5.0.0",
"react-transition-group": "^4.4.2",
"swiper": "^7.4.1",
"web-vitals": "^2.1.2"
},
"devDependencies": {
"#testing-library/jest-dom": "^5.16.1",
"#testing-library/react": "^12.1.2",
"#testing-library/user-event": "^13.5.0",
"#types/dotenv": "^8.2.0",
"#types/jest": "^27.4.0",
"#types/node": "^16.11.17",
"#types/react": "^17.0.38",
"#types/react-dom": "^17.0.11",
"prettier": "^2.5.1",
"typescript": "^4.5.4"
}
Actually i even removed node_modules and did yarn install, but it didn't help me as you can see.
Also I tried to install this dependencies but it caused new errors which broke my app.

Answer 1

A peer dependency should be installed by yourself. Usually, the purpose is to prevent version conflicts.
So, when you read a message such as:
warning "react-scripts > eslint-config-react-app > eslint-plugin-flowtype#8.0.3" has unmet peer dependency "#babel/plugin-syntax-flow#^7.14.5".
It simply means that the dependency eslint-plugin-flowtype that you are (indirectly) using (through react-scripts) requires that you add #babel/plugin-syntax-flow also as dependency in your package.json.