"recovery using the BACKUP CONTROLFILE option must be done"
*Cause: Either an earlier database recovery session specified BACKUP
CONTROLFILE, or the control file was recreated with the RESETLOGS
option, or the control file being used is a backup control file.
After that only BACKUP CONTROLFILE recovery is allowed
and it must be followed by a log reset at the next database open.
*Action: Perform recovery using the BACKUP CONTROFILE option.