Netgear XS712T v2 socket xg12 "detach"

I hope someone on this discussion board can help.

I have a Netgear Prosafe XS712T v2 network switch that supports a mixture of 10Gb/s devices connected to rj45 sockets xg1 to xg10, and an SFP+ device on socket xg12.  Two weeks ago, I started to receive warning messages from the SFP+ connected device (SFP+ socket xg12) that the connection to the network was intermittant.  This was then followed by the device being disconnected from the network altogether.  The network switch control webpage reports that socket xg12 has a "detach" link status.  I have attempted a factory reset, but socket xg12 link status remains "detach".

How can I convert this "detach" status back to normal ethernet operation ?  Or does this link status mean that the xg12 socket connection is damaged beyond resetting.