What causes npm could not resolve errors? - node.js

Question

I have existing project that I tried installing package via npm install.
I cloned my project again thinking that it would fix, but every time I run npm install I am getting this error:
npm ERR! code ERESOLVE
npm ERR! ERESOLVE could not resolve
npm ERR!
npm ERR! While resolving: eslint-plugin-import#2.24.1
npm ERR! Found: eslint#8.20.0
npm ERR! node_modules/eslint
npm ERR! dev eslint#"^8.20.0" from the root project
npm ERR! peer eslint#">= 4.12.1" from babel-eslint#10.1.0
npm ERR! node_modules/babel-eslint
npm ERR! dev babel-eslint#"^10.1.0" from the root project
npm ERR! 3 more (eslint-config-prettier, eslint-plugin-prettier, eslint-utils)
npm ERR!
npm ERR! Could not resolve dependency:
npm ERR! peer eslint#"^2 || ^3 || ^4 || ^5 || ^6 || ^7.2.0" from eslint-plugin-import#2.24.1
npm ERR! node_modules/eslint-plugin-import
npm ERR! dev eslint-plugin-import#"^2.23.4" from the root project
npm ERR! peer eslint-plugin-import#"^2.22.1" from eslint-config-airbnb#18.2.1
npm ERR! node_modules/eslint-config-airbnb
npm ERR! 1 more (eslint-config-airbnb-base)
npm ERR!
npm ERR! Conflicting peer dependency: eslint#7.32.0
npm ERR! node_modules/eslint
npm ERR! peer eslint#"^2 || ^3 || ^4 || ^5 || ^6 || ^7.2.0" from eslint-plugin-import#2.24.1
npm ERR! node_modules/eslint-plugin-import
npm ERR! dev eslint-plugin-import#"^2.23.4" from the root project
npm ERR! peer eslint-plugin-import#"^2.22.1" from eslint-config-airbnb#18.2.1
npm ERR! node_modules/eslint-config-airbnb
npm ERR! 1 more (eslint-config-airbnb-base)
npm ERR!
npm ERR! Fix the upstream dependency conflict, or retry
npm ERR! this command with --force, or --legacy-peer-deps
npm ERR! to accept an incorrect (and potentially broken) dependency resolution.
I have no idea what is going on.
what is the reason for this error?
how can I get rid of it?
is it the eslint that I have to remove to fix it?

Answer 1

One possible cause for it is that you have some dependency, which has a peer dependency of specific version. Now, in your package.json you have another version of this peer dependency, so npm tells you this.
You have 2 options:
Use in your package.json dependencies that are required by the problematic package
Use --legacy-peer-deps flag or set this setting in .npmrc file to be true, which will ignore the peer dependency requirement and can possible break your code.

Answer 2

this error can when you cannot install npm on the right folder this answer will help your sir......
otherwise your will try this
npm install --legacy-peer-deps then
it adds this in my package-lock.json
"node_modules/#unimodules/react-native-adapter": {
"version": "5.7.0",
"resolved": "https://registry.npmjs.org/#unimodules/react-native-adapter/-/react-native-adapter-5.7.0.tgz",
"integrity": "sha512-L557/+sc8ZKJVgo1734HF1QNCxrt/fpqdmdNgySJT+kErux/AJNfPq3flsK0fyJduVmniTutYIMyW48cFoPKDA==",
"dependencies": {
"invariant": "^2.2.4",
"lodash": "^4.5.0"
},
"peerDependencies": {
"react-native": "*",
"react-native-web": "~0.13.7"
}
},
...
"#unimodules/react-native-adapter": {
"version": "5.7.0",
"resolved": "https://registry.npmjs.org/#unimodules/react-native-adapter/-/react-native-adapter-5.7.0.tgz",
"integrity": "sha512-L557/+sc8ZKJVgo1734HF1QNCxrt/fpqdmdNgySJT+kErux/AJNfPq3flsK0fyJduVmniTutYIMyW48cFoPKDA==",
"requires": {
"invariant": "^2.2.4",
"lodash": "^4.5.0"
}
},