This domain is already associated with this account

This domain is already associated with this account

i have problem with "This domain is already associated with this account". Please help me.   
DOMAIN: GMF.COM.CO

Hello, I use this domain and when I try to 
create the email accounts, I get that message,
I imagine that I created the previous person who handles it,
 but nobody has that user data or keys. Delete the dns from zoho in the domain to see if
it lets me create a new gutter but nothing.