A BIG-IP Administrator is conducting maintenance on one BIG-IP appliance in an HA Pair.

Comprehensive and Detailed Explanation From BIG-IP Administration Con10trol Plane Administration documents:Placing a device in the FORCED_OFFLINE state is a critical procedural concept for HA maintenance111213.1415Unlike simply being 'Standby16', the FORCED_OFFLINE state ensures tha17t the Control Plane will not participate in failover selection, effectively preventing the device from becoming 'Active' even if the peer fails18. This state also allows the administrator to terminate existing connections to ensure no traffic is being processed during the maintenance window19.