"The data you have entered already exists" when trying to create deleted accounts in Zoho Mail - Using Control Panel

"The data you have entered already exists" when trying to create deleted accounts in Zoho Mail - Using Control Panel

Hi all,

Our domain is symsoluciones.com. Working as admin in the control panel:
When I try to add the email account " cesarmedina@symsoluciones.com" and " felixsolis@symsoluciones.com" I get the error: "The data you have entered already exists"

The accounts in mention, were created and eliminated, but I do not know continue to appear as existing.

Any ideas? Can anybody help us?

thanks!