Multiple Database Validations
When you create a domain, you must associate it with a database. When you create a new primary domain (database is your current database) in a multi-database environment, all databases must be connected. This prevents you from using a domain name that already exists as a primary domain in another connected database.
If the database you specify is not the database you are currently logged in to, the domain is considered a connection record. Normally, you do not need to create connection records manually. When you create a new primary domain, the system automatically creates connection records in other databases defined in Database Connection Maintenance (36.6.1).
If you do create a connection record manually, the system verifies that the domain exists as a primary domain in a connected database. Otherwise, the following error is displayed:
You cannot create a connection domain without a primary domain.
When you are using multiple databases operating over a network, the system uses the domain associated with a site to determine where database records should be updated.