The firewall validates
that downloaded content updates are still Palo Alto Networks- recommended
at the time of installation. This check, which the firewall performs
by default, is helpful in cases where content updates are downloaded
from the Palo Alto Networks update server (either manually or on
a schedule) ahead of installation. Because there are rare instances
where Palo Alto Networks removes a content update from availability,
this option prevents the firewall from installing a content update
that Palo Alto Networks has removed, even if the firewall has already
downloaded it. If you see an error message that the content update
you’re attempting to install is no longer valid,
Check
Now
to get the most recent content update and install
that version instead ().