Creating New Organization in CRM 2016 On-premises

Hello everyone,

I want to create new organization in MS CRM 2016 on-premises. If i create new organization or import organization.I get this dialogue "To create a new organization,the wizard must remove the current organization.After the wizard complete you will no longer have access to this organization". 

New organization is getting created but my old organization is getting deleted. Same happen if i import organization also. I don't know what am missing.

Thanks in advance.

Karthik V