Retention Fail with Bareos - configuration

Question

I am encountering backup disk saturation issues in production.
Directory to backup = 400Go
Backup disk = 2To
Scheduling:
A Full backup every 2 days
An Incremental backup every hour
Retention duration of 2 days
I have recreated these issues in prototypes.
Directory to backup = 400Mo
Size of the backup directory = 48Go
Scheduling:
A Full backup every hour
An Incremental backup every 15 minutes
Retention duration of 2 hours
The issue is that :
After 5 days, the prototype backup directory is 48Go (which accurately reproduces the fact that the 2To production backup disk is saturating).
My observations are:
The backup volumes remain on the disk.
File size in the backup directory
It appears that the retention duration defined in the Pool configuration is not being taken into account.
Here is an example of a Backup still present in the Volumes
Data that should no longer exist
My tests :
Adding to the storage Pool:
File Retention = 2 hours
Recycle Oldest Volume = yes
Result: without success
Here is the prototype's configuration file:
Job {
Name = "backup-Client2"
Type = Backup
Level = Incremental
Client = Client2
FileSet = "FileSet_Client2"
Schedule = "Schedule_Client2"
Storage = Storage_Client2
Messages = Standard
Pool = Incremental_Client2
Priority = 1
Write Bootstrap = "/var/lib/bareos/%c.bsr"
Full Backup Pool = Full_Client2
Incremental Backup Pool = Incremental_Client2
}
FileSet {
Name = "FileSet_Client2"
Description = "Sauvegarde de tous les répertoires présents dans /home et /etc"
Include {
Options {
signature = MD5
}
File = "/home"
File = "/DATA"
File = "/etc"
}
}
Schedule {
Name = "Schedule_Client2"
Run = Full hourly
Run = Incremental hourly at 0:15
Run = Incremental hourly at 0:30
Run = Incremental hourly at 0:45
}
Client {
Name = "Client2"
Address = "192.168.1.78"
Password = "*****"
}
Storage {
Name = Storage_Client2
Address = 192.168.1.78
Password = "******"
Device = Client2FileStorage
Media Type = File
}
Pool {
Name = Incremental_Client2
Pool Type = Backup
Recycle = yes
AutoPrune = yes
Action On Purge = Truncate
Volume Retention = 1 hours
File Retention = 1 hours
Recycle Oldest Volume = yes
Label Format = "Incremental_Client2-"
}
Pool {
Name = Full_Client2
Pool Type = Backup
Recycle = yes
AutoPrune = yes
Action On Purge = Truncate
Volume Retention = 2 hours
File Retention = 2 hours
Recycle Oldest Volume = yes
Label Format = "Full_Client2-"
}
Did I forget a parameter?
Thank you to whoever can give me some solution leads.