Error: Cannot find module 'validate-npm-package-name'

[jlc488]

sins-MacBook-Air:atog-middleware-geo-db-updater sinkang$ yo lambda-scaffolding
module.js:327
throw err;
^

Error: Cannot find module 'validate-npm-package-name'
at Function.Module._resolveFilename (module.js:325:15)
at Function.Module._load (module.js:276:25)
at Module.require (module.js:353:17)
at require (internal/module.js:12:17)
at Object. (/usr/local/lib/node_modules/generator-lambda-scaffolding/generators/app/index.js:7:27)
at Module._compile (module.js:409:26)
at Object.Module._extensions..js (module.js:416:10)
at Module.load (module.js:343:32)
at Function.Module._load (module.js:300:12)
at Module.require (module.js:353:17)
at require (internal/module.js:12:17)

when i am creating a project.. it gives error