ORA-16661: the standby database needs to

admin

ORA-16661: thestandby database needs to be reinstated
Cause: A role change has caused this database to requirereinstatement.
Action: Usethe DGMGRL REINSTATE DATABASE command or Enterprise
Manager to reinstate the database. Reinstate the database as soon as possible,
because the database will have to be re-created if another role change occurswhile
it is in this state.