Comment 2 for bug 1863665

<spoiler>
Feb 17 18:25:57 xubuntu apt-setup: Using CD-ROM mount point /cdrom/
Feb 17 18:25:57 xubuntu apt-setup: Identifying... [fc36a078173a22d553c4410a7c473797-2]
Feb 17 18:25:57 xubuntu apt-setup: Scanning disc for index files...
Feb 17 18:25:58 xubuntu apt-setup: Found 11 package indexes, 0 source indexes, 0 translation indexes and 1 signatures
Feb 17 18:25:58 xubuntu apt-setup: Found label 'Xubuntu 18.04.1 LTS _Bionic Beaver_ - Release amd64 (20180725)'
Feb 17 18:25:58 xubuntu apt-setup: This disc is called:
Feb 17 18:25:58 xubuntu apt-setup: 'Xubuntu 18.04.1 LTS _Bionic Beaver_ - Release amd64 (20180725)'
Feb 17 18:25:58 xubuntu apt-setup: Copying package lists...
Feb 17 18:25:59 xubuntu apt-setup: gpgv: Signature made Rab 25 Jul 2018 10:28:35 WIB
Feb 17 18:25:59 xubuntu apt-setup: gpgv: using RSA key D94AA3F0EFE21092
Feb 17 18:25:59 xubuntu apt-setup: gpgv: Good signature from "Ubuntu CD Image Automatic Signing Key (2012) <email address hidden>"
Feb 17 18:25:59 xubuntu apt-setup: #015Reading Package Indexes... 0%
Feb 17 18:25:59 xubuntu apt-setup: #015Reading Package Indexes... 0%
Feb 17 18:25:59 xubuntu apt-setup: #015Reading Package Indexes... Done
Feb 17 18:25:59 xubuntu apt-setup: Writing new source list
Feb 17 18:25:59 xubuntu apt-setup: Source list entries for this disc are:
Feb 17 18:25:59 xubuntu apt-setup: deb cdrom:[Xubuntu 18.04.1 LTS _Bionic Beaver_ - Release amd64 (20180725)]/ bionic main multiverse restricted universe
Feb 17 18:25:59 xubuntu apt-setup: deb cdrom:[Xubuntu 18.04.1 LTS _Bionic Beaver_ - Release amd64 (20180725)]/ <font color="red">kali</font>-last-snapshot contrib main non-free
Feb 17 18:25:59 xubuntu apt-setup: Repeat this process for the rest of the CDs in your set.
Feb 17 18:25:59 xubuntu /bin/in-target: warning: /target/etc/mtab won't be updated since it is a symlink.
Feb 17 18:26:00 xubuntu in-target: Ign:1 cdrom://Xubuntu 18.04.1 LTS _Bionic Beaver_ - Release amd64 (20180725) bionic InRelease
Feb 17 18:26:00 xubuntu in-target: Ign:2 cdrom://Xubuntu 18.04.1 LTS _Bionic Beaver_ - Release amd64 (20180725) <font color="red">kali</font>-last-snapshot InRelease
Feb 17 18:26:00 xubuntu in-target: Hit:3 cdrom://Xubuntu 18.04.1 LTS _Bionic Beaver_ - Release amd64 (20180725) bionic Release
Feb 17 18:26:00 xubuntu in-target: Err:4 cdrom://Xubuntu 18.04.1 LTS _Bionic Beaver_ - Release amd64 (20180725) <font color="red">kali</font>-last-snapshot Release
</spoiler>
It turns out I still have Kali installation in my media, remake my installation media solved the problem.