Several restrictions apply to the creation of subscriptions that replicate data from or into warm standby databases.
When there is a logical connection for a database, you cannot create a subscription for the physical active or standby database. You must create the subscription for the logical database in order to replicate subscription data into or from both the active and standby databases.
You cannot create subscriptions while adding the standby database to the replication system. You must wait until the standby database has been properly initialized.
You cannot add the standby database to the replication system while any subscriptions are being created.
You cannot create new subscriptions while the switch active command is executing.