Problem while starting a new project

When I was creating my new project then I got following problem:

What ionic version are you running?

Also, if you want to create an ionic 2 app you’ll have to use : ionic start myapp --v2

I am not sure with what ionic version you work
i am using this line:
ionic start project_name template_name --v2 --ts
–v2 for ionic 2
and --ts for typescript if you need it