Q:ionic2 start have error

when i run ionic start test tabs,npm instanll have problem like this,any help?

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

    npm WARN deprecated object-keys@0.2.0: Please update to the latest object-keys
    npm ERR! code EINTEGRITY
    npm ERR! sha1-T2O+sOp19jQCqE4oWn6F3/ui6zY= integrity checksum failed when using sha1: wanted sha1-T2O+sOp19jQCqE4oWn6F3/ui6zY= but got sha1-dFJ7pj/QMynsq3vXPRxBzTZdl34=. (630908 bytes)

    npm ERR! A complete log of this run can be found in:
    npm ERR!     /Users/yeezy/.npm/_logs/2017-06-06T02_33_30_452Z-debug.log

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