ORA-12324: cannot use the ROM: link type

admin

ORA-12324: cannot usethe ROM: link type on a private database link
Cause: You can only specify the ROM: link type on a public,not a private,
database link.
Action: Determineif there is an existing public database link to the secondary
database. If not, and if you wish to establish public access to the secondary
database, create a public database link to the secondary database using the
CREATE DATABASE LINK command.