Configure the Maximum Number of Configuration Backups on Panorama

Select
Panorama
Setup
Management
and edit the Logging and Reporting Settings.
Select
Log Export and Reporting
and enter the
Number of Versions for Config Backups
(default is 100; range is 1 to 1,048,576).
Click
OK
to save your changes.
Select
Commit
Commit to Panorama
and
Commit
your changes.