I’ve checked some notes, there might be an issue For those who have read through only tablespaces, then “”BACKUP OPTIMIZATION ON” brings about skipping the backup of such datafiles when there is a backup available. I’m not sure and will check this on the other impacted DBs and report it https://simonxikfo.blogofoto.com/64145887/an-unbiased-view-of-list-expired-backup-of-archivelog