I tried to setup an Angular project with Angular 8 but by accident I installed Angular 12. I realised this at the end of the project and I tried to downgrade but this is what happened after trying:

dependencies": {
    "@angular/animations": "~12.2.8",
    "@angular/common": "~12.2.8",
    "@angular/compiler": "~12.2.8",
    "@angular/core": "~12.2.8",
    "@angular/forms": "~12.2.8",
    "@angular/platform-browser": "~12.2.8",
    "@angular/platform-browser-dynamic": "~12.2.8",
    "@angular/router": "~12.2.8",
    "@okta/okta-angular": "^3.2.2",
    "@okta/okta-signin-widget": "^5.10.1",
    "core-js": "^2.5.4",
    "rxjs": "~7.3.1",
    "tslib": "^1.9.0",
    "zone.js": "~0.11.4
}

But in the console:

Angular CLI: 8.3.29
Node: 16.4.1
OS: win32 x64
Angular: undefined
...

Package                      Version

    ------------------------------------------------------
    @angular-devkit/architect    0.803.29 (cli-only)
    @angular-devkit/core         8.3.29 (cli-only)
    @angular-devkit/schematics   8.3.29 (cli-only)
    @schematics/angular          8.3.29 (cli-only)
    @schematics/update           0.803.29 (cli-only)

What should I do?

If I try to make a new project to avoid this error, can I copy the Component and Service folder directly to the new one, because I cannot start the project from the beginning?