ASR_903 Interface GigabitEthernet0/5/0 is not supported

[denhabs10]

%ASR900INTF-3-UNSUPPORTED: Interface GigabitEthernet0/5/0 is not supported in subslot 5 by the A900-IMA8T[0/5] module

A903-RSP1A-55

15.4(1)S1, RELEASE SOFTWARE

But port 5/0 is unavailable for use it claims

==== ====================== ====== =============================================
H/W Field Programmable Current Min. Required
Slot Card Type Ver. Device: "ID-Name" Version Version
==== ====================== ====== ================== =========== ==============
0/0 A900-IMA8T 2.0 14-UEA GEIM I/O FP 0.44 0.44
---- ---------------------- ------ ------------------ ----------- --------------
0/1 A900-IMA8T 2.0 14-UEA GEIM I/O FP 0.44 0.44
---- ---------------------- ------ ------------------ ----------- --------------
0/2 A900-IMA8T 2.0 14-UEA GEIM I/O FP 0.44 0.44
---- ---------------------- ------ ------------------ ----------- --------------
0/3 A900-IMA8S 2.0 14-UEA GEIM I/O FP 0.44 0.44
---- ---------------------- ------ ------------------ ----------- --------------
0/4 A900-IMA8S 2.0 14-UEA GEIM I/O FP 0.44 0.44
---- ---------------------- ------ ------------------ ----------- --------------
0/5 A900-IMA8T 2.0 14-UEA GEIM I/O FP 0.47 0.44
==== ====================== ====== ===

[denhabs10]

When you install a Gigabit Ethernet IM in the topmost interface module slot (slot 5), the last interface (interface GigabitEthernet0/5/0) is not operational; the port is reserved for internal communication.