Configuring HA - No mgmt2 interface listed for management interface reservation

[DrDing_Muscle]

Hello all.  I am getting ready to configure a second 1000D into an HA cluster.  From the GUI under the System -> HA menu I am turning on the slider for "Management Interface Reservation" and I want to select the mgmt2 interface as this is the interface that will have unique IPs between the two 1000D devices so that I may manage them from the GUI individually.   The mgmt2 interface is not listed in this dropdown.  Any thoughts as to why?   Thanks in advance.  

[Toshi_Esumi]

Are you sure it's not referred by other part of config? I regularly don't trust GuI's "Ref." column and go to cli and would run "show | grep -f mgmt2".

[DrDing_Muscle]

Thank you for the assistance.  Your command led me to find that there was a static route involving mgmt2.  Once I removed that static route it then let me select mgmt2 as the management reservation port for my HA setup.   Thank you!!