Can´t upgrade to Ubuntu 16.04 LTS, VestaCP failed to fetch

[vravolu]

Trying to go from 14.04 to 16.04, LTS.

It stops with this error:

W:Failed to fetch
http://apt.vestacp.com/trusty/dists/xen ... 6/Packages
404 Not Found
, E:Some index files failed to download. They have been ignored, or
old ones used instead.

Have depleted all possible option which I know. Cannot continue.
Where is a catch?

[vravolu]

Cmon guys. Has nobody yet done an upgrade from 14.04 to 16.04 LTS with Vesta on?

[vravolu]

Solved! With a help from another post: viewtopic.php?f=41&t=3971
I am on Ubuntu 16.04.1 LTS (Xenial Xerus).

How to:

sed -i "/vesacp/d" /etc/apt/sources.list
echo "deb http://apt.vestacp.com/xenial/ xenial vesta" > /etc/apt/sources.list.d/vesta.list
apt-get update

And then I continued with:
sudo do-release-upgrade