State of a firewall (in an active/active configuration) caused by one of the following:
- Failure of a firewall.
- Failure of a monitored object (a link or path).
- The firewall leaves the suspended or non-functional state.

A firewall in the tentative state synchronizes sessions and configurations from the peer.

Information about high availability states:
https://docs.paloaltonetworks.com/pan-os/11-1/pan-os-admin/high-availability/ha-firewall-states