So I have a WHM that was configured to have the following NS.ns1.domain-old.comns2.domain-old.comHowever the domain-old.com domain got expired and is already in the open market. Therefore I asked the WHM support to change my nameserver to my new domain called domain-new.com that I purchased on Godaddy. The support told be that they are already changed the NS to ns1.domain-new.com and ns2.domain-new.com. Unfortunately, when I tried to change the NS on Godaddy I keep getting this message.Nameserver    Actionsns1.domain-new.com Unavailablens2.domain-new.comUnavailableThe data provided cannot be used, please correct it and resubmit your  request.Oh and the domain-new.com Cpanel is on WHM too.UPDATE: Godaddy DNS settingsUpdate 1:Alright, the reason I am creating ns1 and ns2 is we are a hosting reseller for our web development client. The previous NS got expired and already in the open market. Since we have our company domain hosted as well in our Cpanel I asked our hosting provider to change the old NS's to a new NS using our company domain. However, I haven't done any setup aside from what our hosting provider did in WHM which is they just changed the NS to the domain I provided.Currently (for domain-new.com) in my Godaddy I am using the NS's of Cloudflare. Which also adds additional complexity and confusion to me on how to achieve what we need.Update 2:To give a full picture of my setup and what I wanted to achieve.In WHM I have.domain-client-1.comdomain-client-2.comdomain-client-3.comdomain-client-4.comdomain-client-5.comdomain-new.com (our company address)Now these domains below are registered to different domain provider.domain-client-1.comdomain-client-2.comdomain-client-3.comdomain-client-4.comdomain-client-5.comAnd right now the above 5 domains are all down since all of them are using ns1.domain-old.com and ns2.domain-old.com. The problem is what should be the solution to this problem since the domain-old.com is already in the open market and I don't want to require it again. So the solution I came through is to change the nameservers configured in our WHM. Unfortunately, changing nameservers in WHM seems not enough and requires additional steps which is I am not sure at this moment. As mentioned in Update 2 domain-new.com is using Cloudflare nameservers.Now back to the question, how can I make the 5 domains mentioned above to run again? They require nameservers which currently the ns1.domain-new.com and ns2.domain-new.com are both not working.
Changing nameservers in WHM
nameserver