Contao 2.9 Site Root

Currently - there are pages & sub-pages in a site root (domain-one). On the same install of 2.9, I would like to create another site root (domain-two) / Cut & Paste pages of domain-one to domain-two. Is this possible or will it create parent ID conflict? Thanks.

No conflicts, you can copy all page in the new site root.
He creates new pages with a new id

Thank You!