Unmet Peer dependency warning even after installing the peer dependency - npm

Question

I'm trying to add redux to an Ionic 3+ application. This is what I ran:
npm i redux #angular-redux/store flux-standard-action redux-logger --save
I get the following error: UNMET PEER DEPENDENCY redux#4.0.1
So, I then completed the following steps to try to rectify the issue:
rm -rf node_modules/
npm cache clean
npm install redux#4.0.1 --save
This gives me the same err: UNMET PEER DEPENDENCY redux#4.0.1
How can it be a dependency of itself? Something weird is going on. I've tried rearranging where in the package.json the listing falls, to no avail. Help please. Below is my package.json
{
"name": "ionic-testing-elite-ionic",
"author": "Ionic Framework",
"homepage": "https://ionicframework.com/",
"private": true,
"scripts": {
"clean": "ionic-app-scripts clean",
"build": "ionic-app-scripts build",
"ionic:build": "ionic-app-scripts build",
"ionic:serve": "ionic-app-scripts serve",
"test": "karma start ./test-config/karma.conf.js",
"test-ci": "karma start ./test-config/karma.conf.js --single-run",
"e2e-update": "webdriver-manager update --standalone false --gecko false",
"e2e-test": "protractor ./test-config/protractor.conf.js",
"e2e": "npm run e2e-update && npm run e2e-test"
},
"dependencies": {
"#angular-redux/store": "^7.1.1",
"#angular/common": "5.0.0",
"#angular/compiler": "5.0.0",
"#angular/compiler-cli": "5.0.0",
"#angular/core": "5.0.0",
"#angular/forms": "5.0.0",
"#angular/http": "5.0.0",
"#angular/platform-browser": "5.0.0",
"#angular/platform-browser-dynamic": "5.0.0",
"#ionic-native/core": "3.12.1",
"#ionic-native/splash-screen": "3.12.1",
"#ionic-native/status-bar": "3.12.1",
"#ionic/storage": "2.1.3",
"flux-standard-action": "^2.0.3",
"ionic-angular": "^3.9.2",
"ionicons": "3.0.0",
"redux": "^4.0.1",
"redux-logger": "^3.0.6",
"rxjs": "5.5.2",
"sw-toolbox": "3.6.0",
"zone.js": "0.8.18"
},
"devDependencies": {
"#ionic/app-scripts": "3.1.0",
"#types/jasmine": "^2.5.41",
"#types/node": "^7.0.8",
"angular2-template-loader": "^0.6.2",
"html-loader": "^0.4.5",
"ionic": "3.9.2",
"jasmine": "^2.5.3",
"jasmine-spec-reporter": "^4.1.0",
"karma": "^1.5.0",
"karma-chrome-launcher": "^2.0.0",
"karma-jasmine": "^1.1.0",
"karma-jasmine-html-reporter": "^0.2.2",
"karma-sourcemap-loader": "^0.3.7",
"karma-webpack": "^2.0.3",
"null-loader": "^0.1.1",
"protractor": "^5.1.1",
"ts-loader": "^2.0.3",
"ts-node": "^3.0.2",
"typescript": "2.4.2"
},
"version": "0.0.1",
"description": "An Ionic project"
}

Answer 1

OK. I read some more into the error I was getting. The problem was that the current redux package which was being installed by default was not compatible with the version of #angular-redux/store which was being installed. There has been a major version upgrade to redux which isn't backwards compatible. I had to install redux#3.7.2 and it fixed the problem.