Changes in the Backup Staging Directory won't come into effect

Operating System & Version
CloudLinux 6.10
cPanel & WHM Version
86.0.18

Bretas

Active Member
PartnerNOC
Jun 10, 2018
30
7
8
Brazil
cPanel Access Level
Root Administrator
Hy!

It was brought to my attention that our staff was unable to restore a local user's backup, the error message is as follows:

Code:
Could not restore account “revestim”: Insufficient disk space is available. “/backup/n28br/weekly/2020-04-08/accounts” on host “(Hostname Redacted)” has 43.22 GB free and requires at least 62.55 GB free, which includes space for temporary files.
To put it in context, the directory "/backup/n28br" is a NFS mount and it's mounted at boot time (declared in the fstab).

Despite what the error message suggests, the directory where there's only 43.22GB free is not within the backup partition (which still has 2.8TB available) instead it's the root one:

Code:
/dev/xvda2             99G   50G   44G  54% /
tmpfs                 7.8G  4.0K  7.8G   1% /dev/shm
/dev/xvda1            248M   98M  138M  42% /boot
/dev/xvde1            985G  752G  184G  81% /home
/dev/xvdc1            148G   13G  128G  10% /var/lib/mysql
/dev/xvdg1            985G  678G  257G  73% /home2
/dev/xvdf1            493G  251G  217G  54% /home3
10.150.39.135:/backupbr/n28br
                      7.3T  4.8T  2.6T  66% /backup/n28br
So I realized that the Backup Staging directory setup in WHM -> "Backup Configuration" was actually incorrect, it was set up as "/backup" rather than "/backup/n28br", which explains why it was trying to use the root partition as a temporary dir. So I created a "/home2/restaurar-backup" dir (257GB free) and put this path under "Backup Staging Directory", still the same error message and same alleged free disk space, which suggests cPanel is not actually using the new staging dir:

Code:
Could not restore account “revestim”: Insufficient disk space is available. “/backup/n28br/weekly/2020-04-08/accounts” on host “(Hostname Redacted)” has 43.22 GB free and requires at least 62.55 GB free, which includes space for temporary files.
I tried restoring from command line as well by running "/scripts/restorepkg revestim", to no avail. I also restarted cPanel service just in case and ran the restore again, nothing changed. Judging by the fact that it keeps claiming there's only ~43GB, it's safe to say cPanel is still mistakenly trying to use the / partition. What am I missing here?

Thanks!