Viprion Upgrade - How to make sure existing config is copied

Hi,

 

We've got a number of Viprions (No vCMP, 1 blade) which I need to upgrade from 11.4.1 to 11.5.1. However when I get to the Boot Locations the option to copy config is greyed out and set to no. As these boxes are in a remote location, with no serial connectivity I don't really want to reboot without the existing config being copied over (especially the bigip_base.conf).

 

Surprised that there isn't a SOL document (that I can find!) which explains the situation as having the config not come over is a major issue (and drawback).

 

Can somebody confirm the precises steps to carry out to upgrade a Viprion and make the config move over as well.

 

Many thanks in advance