Device v3/2350 was already upgraded (and had firmware 1.2.31).
Bootupgrade is a kind service currently provided free of charge (to remote upgrade devices purchased >5..6 years ago, to latest features)
Only one remote bootupgrade for any certain device is allowed.
Furthermore, in the current bootupgrade request it was NOT mentioned at all that now serial number 0000-UNKNOWN - RAW: FF FF FF FF FF... (cannot flash firmware in vemstune this way; not mentioning important details is a waste of time.)
Checkout [177 coupon] with card (gut replacement fee)
- you receive an old plainhex file now, and (although this is against policy) bootupgrade pw in hope it will be prompt help.
- gut replacement can be done later (2016-2020 at your choice, but not ASAP option) for no payment than.