The VM-Series firewall has been optimized and expanded
to deliver improved performance and expanded capacities, which necessitates
a change in the number of cores and memory allocated to the EC2
instance. For the new resource footprint, you need to match the
appropriate Instance sizes available on AWS before you upgrade your
VM-Series firewalls on AWS running PAN-OS 7.1 or earlier versions.;
For details, refer to Upgrading the VM-Series with PAN-OS 8.0 on AWS.