how to disregard partial backups in PureDisk

NBU 7.6.0.3

overnight i have this Oracle backup that failed in the early hours of the morning. it has already backup almost 1TB of data when it failed (due to missing archive). i have cancelled the retried job and manually started a fresh one.

for the partial backup images that were already done, how can i prevent dedup from using them and also how to free up the disk space consumed by them?

regards,

Rino