Errores que pasa

PS C:\Users\CG_MGA_Deybi> dir ionic3
PS C:\Users\CG_MGA_Deybi> cd ionic3
PS C:\Users\CG_MGA_Deybi\ionic3> ionic start primerapp blank
√ Creating directory .\primerapp - done!
[INFO] Fetching app base (https://github.com/ionic-team/ionic2-app-base/archive/master.tar.gz)
√ Downloading - done!
[INFO] Fetching starter template blank (https://github.com/ionic-team/ionic2-starter-blank/archive/master.tar.gz)
√ Downloading - done!
√ Updating package.json with app details - done!
√ Creating configuration file ionic.config.json - done!
[INFO] Installing dependencies may take several minutes!

npm install
× Running command - failed!
[ERROR] An error occurred while running npm install (exit code 1):

    npm WARN deprecated babili@0.1.2: babili has been renamed to babel-minify. Please update to babel-minify
    npm WARN deprecated babel-preset-babili@0.1.4: babili has been renamed to babel-minify. Please update to
    babel-preset-minify
    npm WARN deprecated object-keys@0.2.0: Please update to the latest object-keys
    npm WARN optional SKIPPING OPTIONAL DEPENDENCY: webpack@3.6.0 (node_modules\webpack):
    npm WARN enoent SKIPPING OPTIONAL DEPENDENCY: ENOENT: no such file or directory, utime
    'C:\Users\CG_MGA_Deybi\ionic3\primerapp\node_modules\.staging\webpack-76fb4e4e\hot\.eslintrc'
    npm WARN optional SKIPPING OPTIONAL DEPENDENCY: node-sass@4.5.3 (node_modules\node-sass):
    npm WARN enoent SKIPPING OPTIONAL DEPENDENCY: ENOENT: no such file or directory, utime
    'C:\Users\CG_MGA_Deybi\ionic3\primerapp\node_modules\.staging\node-sass-267b6d5f\src\custom_importer_bridge.h'
    npm WARN optional SKIPPING OPTIONAL DEPENDENCY: rollup-plugin-commonjs@8.0.2
    (node_modules\rollup-plugin-commonjs):
    npm WARN optional SKIPPING OPTIONAL DEPENDENCY: EEXIST: file already exists, mkdir
    'C:\Users\CG_MGA_Deybi\ionic3\primerapp\node_modules\.staging\rollup-plugin-commonjs-d659888c\dist'
    npm WARN optional SKIPPING OPTIONAL DEPENDENCY: File exists:
    C:\Users\CG_MGA_Deybi\ionic3\primerapp\node_modules\.staging\rollup-plugin-commonjs-d659888c\dist
    npm WARN optional SKIPPING OPTIONAL DEPENDENCY: uglify-js@2.8.29
    (node_modules\uglifyjs-webpack-plugin\node_modules\uglify-js):
    npm WARN enoent SKIPPING OPTIONAL DEPENDENCY: ENOENT: no such file or directory, utime
    'C:\Users\CG_MGA_Deybi\ionic3\primerapp\node_modules\.staging\uglify-js-7887171f\tools\exports.js'
    npm WARN optional SKIPPING OPTIONAL DEPENDENCY: magic-string@0.16.0
    (node_modules\rollup-plugin-node-globals\node_modules\magic-string):
    npm WARN enoent SKIPPING OPTIONAL DEPENDENCY: ENOENT: no such file or directory, utime
    'C:\Users\CG_MGA_Deybi\ionic3\primerapp\node_modules\.staging\magic-string-4b98e5be\dist\magic-string.umd.js.map'
    npm WARN optional SKIPPING OPTIONAL DEPENDENCY: node-gyp@3.6.2 (node_modules\node-gyp):
    npm WARN enoent SKIPPING OPTIONAL DEPENDENCY: ENOENT: no such file or directory, utime
    'C:\Users\CG_MGA_Deybi\ionic3\primerapp\node_modules\.staging\node-gyp-1a1b63cf\gyp\pylib\gyp\generator\msvs.py'
    npm WARN optional SKIPPING OPTIONAL DEPENDENCY: tslint@5.7.0 (node_modules\tslint):
    npm WARN enoent SKIPPING OPTIONAL DEPENDENCY: ENOENT: no such file or directory, utime
    'C:\Users\CG_MGA_Deybi\ionic3\primerapp\node_modules\.staging\tslint-e37efefa\lib\rules\maxLineLengthRule.js'

    npm ERR! code EINTEGRITY
    npm ERR! sha1-0t0whTsM9KVHWLSjFGMsIx+clMM= integrity checksum failed when using sha1: wanted
    sha1-0t0whTsM9KVHWLSjFGMsIx+clMM= but got sha1-fzGCbTpwfGwyiuAdxEXcs7a6TnE=. (2759 bytes)

    npm ERR! A complete log of this run can be found in:
    npm ERR!     C:\Users\CG_MGA_Deybi\AppData\Roaming\npm-cache\_logs\2017-09-24T16_51_16_319Z-debug.log

PS C:\Users\CG_MGA_Deybi\ionic3>