Why is showing twice one interface on MDS97000

[BabSimon]

We met a strange on my mds cisco switch . After make connect to interface from my device according to follow pic it is showing twice for fc1/23 . Why happened this issue ?

[balaji.bandi]

they are 2 different MAC address - what is that connected to ?

[BabSimon]

As you can see there are difference wwpn and I just make one connection from a device to interface fc1/23 on MDS but why is showing twice interface name fc1/23 ?