keyfile authorisation issues during 5.1 installation.

[Ben Walker]

I have the same problem. Most devices work fine, but (eg) Prodyssey and Arpeg02 always ask for authorisation despite being in the key file I import.
I will email sonic-core but get the feeling they're a bit swamped with key requests at the moment, so thought I'd check here first to see if anyone has a solution.

thanks,
Ben