Installing the specific angular version not working (Angular 5.2.10) - angular5

Question

I am trying to downgrade from Angular 6 to 5 but somehow, the way to install specific version is not working on my machine. See below:
Note: I already uninstalled angular 6.
npm ERR! notarget No matching version found for #angular/cli#5.2.10
please help.
Thanks in advance!
Here are the logs:
0 info it worked if it ends with ok
1 verbose cli [ 'C:\Program Files\nodejs\node.exe',
1 verbose cli
'C:\Users\TEUSER\AppData\Roaming\npm\node_modules\npm\bin\npm-cli.js',
1 verbose cli 'install',
1 verbose cli '-g',
1 verbose cli '#angular/cli#5.2.10' ]
2 info using npm#6.0.0
3 info using node#v8.11.3
4 verbose npm-session 5c326aa0674c8d9b
5 silly install loadCurrentTree
6 silly install readGlobalPackageData
7 http fetch GET 200 https://registry.npmjs.org/#angular%2fcli 41ms
(from cache)
8 silly registry:manifest no matching version for #angular/cli#5.2.10
in the cache. Forcing revalidation
9 http fetch GET 304 https://registry.npmjs.org/#angular%2fcli 1013ms
(from cache)
10 silly fetchPackageMetaData error for #angular/cli#5.2.10 No
matching version found for #angular/cli#5.2.10
11 timing stage:rollbackFailedOptional Completed in 1ms
12 timing stage:runTopLevelLifecycles Completed in 1515ms
13 verbose type version
14 verbose stack #angular/cli: No matching version found for
#angular/cli#5.2.10
14 verbose stack at pickManifest
(C:\Users\TEUSER\AppData\Roaming\npm\node_modules\npm\node_modules\npm-pick-manifest\index.js:65:11)
14 verbose stack at fetchPackument.then.packument
(C:\Users\TEUSER\AppData\Roaming\npm\node_modules\npm\node_modules\pacote\lib\fetchers\registry\manifest.js:52:18)
14 verbose stack at tryCatcher
(C:\Users\TEUSER\AppData\Roaming\npm\node_modules\npm\node_modules\bluebird\js\release\util.js:16:23)
14 verbose stack at Promise._settlePromiseFromHandler
(C:\Users\TEUSER\AppData\Roaming\npm\node_modules\npm\node_modules\bluebird\js\release\promise.js:512:31)
14 verbose stack at Promise._settlePromise
(C:\Users\TEUSER\AppData\Roaming\npm\node_modules\npm\node_modules\bluebird\js\release\promise.js:569:18)
14 verbose stack at Promise._settlePromise0
(C:\Users\TEUSER\AppData\Roaming\npm\node_modules\npm\node_modules\bluebird\js\release\promise.js:614:10)
14 verbose stack at Promise._settlePromises
(C:\Users\TEUSER\AppData\Roaming\npm\node_modules\npm\node_modules\bluebird\js\release\promise.js:693:18)
14 verbose stack at Async._drainQueue
(C:\Users\TEUSER\AppData\Roaming\npm\node_modules\npm\node_modules\bluebird\js\release\async.js:133:16)
14 verbose stack at Async._drainQueues
(C:\Users\TEUSER\AppData\Roaming\npm\node_modules\npm\node_modules\bluebird\js\release\async.js:143:10)
14 verbose stack at Immediate.Async.drainQueues
(C:\Users\TEUSER\AppData\Roaming\npm\node_modules\npm\node_modules\bluebird\js\release\async.js:17:14)
14 verbose stack at runCallback (timers.js:810:20)
14 verbose stack at tryOnImmediate (timers.js:768:5)
14 verbose stack at processImmediate [as _immediateCallback]
(timers.js:745:5)
15 verbose cwd C:\Users\TEUSER
16 verbose Windows_NT 10.0.17134
17 verbose argv "C:\Program Files\nodejs\node.exe"
"C:\Users\TEUSER\AppData\Roaming\npm\node_modules\npm\bin\npm-cli.js"
"install" "-g" "#angular/cli#5.2.10"
18 verbose node v8.11.3
19 verbose npm v6.0.0
20 error code ETARGET
21 error notarget No matching version found for #angular/cli#5.2.10
22 error notarget In most cases you or one of your dependencies are
requesting
22 error notarget a package version that doesn't exist.
23 verbose exit [ 1, true ]

Answer 1

npm uninstall -g #angular/cli
Then, run (--force flag might be required)
npm cache clean
or, if you're using npm > 5.
npm cache verify
[STEP 1] Install an angular-cli specific version
npm install -g #angular/cli#wished.version.here
[STEP 2] Create a project
ng new you-app-name
The resulting white app will be created in the desired angular version.