after deleting domain and create new one with same gmail login account

after deleting domain and create new one with same gmail login account

after deleting domain lukanovic.si an creating new one zobozdravstvo.lukanovic.si and want to create ne mail , got massage whem want to add mail
narocanje@zobozdravstvo.lukanovic.si


The email address is already registered with another account which is not a part of this organization.

please for help
Regards Mihael