How do I change my domain name from my current zoho account to another zoho account?

How do I change my domain name from my current zoho account to another zoho account?

Hi Zoho
How do I change my domain name from my current zoho account to another zoho account?
As I have been trying to create an Email account and adding the domain name to my new zoho account. 

But it keeps tell me that. This domain name seems to be already associated with another account. If you own this domain, please contact us for assistance. 

Please advice. Thanks