GST REGISTRATION

Hi Experts,
currently I have GST registration (proprietary firm-Arnav developers) now this business not continuing.

now , I am going to start new business (proprietary firm-Arnav Enterprises)

I have stopped my old business.

Can I go ahead with existing GST no.for my new business.

Or

should I cancel my existing gst no.& Reapply for new GST no.

Thanks in advance.
Santosh