npm install -g truffle error가 발생했습니다

PS C:UsersAdministrator> npm -v

6.4.1

PS C:UsersAdministrator> npm install -g truffle

npm ERR! Unexpected end of JSON input while parsing near '...nt":"^0.24.0","got":"'

npm ERR! A complete log of this run can be found in:

npm ERR! C:UsersAdministratorAppDataRoamingnpm-cache_logs2018-11-08T14_58_44_094Z-debug.log

PS C:UsersAdministrator>

여기서 막혔습니다. 도와주세요