Do these steps to delete the Quarantine database rows displayed in the Quarantine table. The current version of BPS Pro is 15.4.1. Upgrade to BPS Pro 15.4.1 if you have not already done so.
Clearing/Deleting excessive database entries in the Quarantine table and old quarantined files.
If you have excessive quarantine database table entries and are unable to delete them using the Quarantine Delete Files option use the steps below.
1. Go the BPS Pro > Pro-Tools menu/page > DB Table Cleaner|Remover tool tab page.
2. Delete the quarantine database table by clicking the Drop Radio button for this database table: xx_bpspro_arq_quarantine
3. Click the Empty|Drop button to delete the BPS quarantine database table. A new empty BPS quarantine database table will be automatically created.
4. Use FTP or your web host control panel file manager and delete all folders under the BPS Quarantine folder located here: /wp-content/bps-backup/quarantine/