APT-packagelist after Upgrade Vanilla Trusty->Xenial

Hey,

I have one Cubietruck newly installed with Xenial some weeks ago and one Cubie that had Trusty installed. Both Armbian.

So today I made the dist-upgrade from Trusty to Xenial.

After doing everything and reactivating the sources.list entries for Armbian and NodeJS (shoud be added to the FAQ!) i compared the output of apt-get update and ther eis a difference:

Originally installed with Xenial (also InfluxDB installed, so should be only difference):

Hit:1 http://ports.ubuntu.comxenial InRelease
Hit:2 http://ports.ubuntu.comxenial-security InRelease
Hit:3 http://apt.armbian.comxenial InRelease     
Get:4 http://ports.ubuntu.comxenial-updates InRelease [95.7 kB]
Hit:5 http://ports.ubuntu.comxenial-backports InRelease
Hit:6 https://deb.nodesource.com/node_4.xxenial InRelease
Hit:7 https://repos.influxdata.com/ubuntuxenial InRelease
Get:8 http://ports.ubuntu.comxenial-updates/universe armhf Packages [289 kB]
Fetched 384 kB in 5s (68.2 kB/s)                            
Reading package lists... Done
 

Originally installed Trusty, upgrade to Xenial:

Hit:1 http://ports.ubuntu.comxenial InRelease
Hit:2 http://ports.ubuntu.comxenial-security InRelease
Hit:3 http://ports.ubuntu.comxenial-updates InRelease
Hit:4 http://ports.ubuntu.comxenial-backports InRelease
Hit:5 http://apt.armbian.comxenial InRelease
Hit:6 https://deb.nodesource.com/node_4.xxenial InRelease
Reading package lists... Done
 

I wonder where the "http://ports.ubuntu.comxenial-updates/universe armhf Packages" comes from ... I compared all sources.list FIles and they are all the same ... Anyone an idea?

Ingo Fischer