Swap domains of two sites with each other in multisite
Looking for advice on the best way to swap the domains of two sites with each other in a multisite instance.
Yet to find good info on my particular situation: I created a new site (subdomain) as an overhaul of an existing site (TLD). Now that the new site is finished (new theme, content etc) I wish to switch the domains to put the new site on the TLD and keep the original site as a backup on the subdomain.
Any advice how how to achieve this without breaking everything?
I have a domain mapping plugin which allows me to set custom domains and I use cloudflare.