Ubunutu 19.04 is showing error in updating

[Asmita Neupane]

Ign:1 http://dl.google.com/linux/chrome/deb stable InRelease
Hit:2 http://ppa.launchpad.net/linuxuprising/java/ubuntu disco InRelease
Hit:3 http://dl.google.com/linux/chrome/deb stable Release
Hit:4 http://archive.ubuntu.com/ubuntu disco InRelease
Ign:5 http://ppa.launchpad.net/sun-java-community-team/sun-java6/ubuntu disco InRelease
Get:7 http://archive.ubuntu.com/ubuntu disco-updates InRelease [97.5 kB]
Hit:8 http://ppa.launchpad.net/webupd8team/java/ubuntu disco InRelease
Get:9 http://archive.ubuntu.com/ubuntu disco-backports InRelease [88.8 kB]
Err:10 http://ppa.launchpad.net/sun-java-community-team/sun-java6/ubuntu disco Release
  404 Not Found [IP: 91.189.95.83 80]
Get:11 http://archive.ubuntu.com/ubuntu disco-security InRelease [97.5 kB]
Get:12 http://archive.ubuntu.com/ubuntu disco-updates/main Sources [80.1 kB]
Get:13 http://archive.ubuntu.com/ubuntu disco-updates/universe Sources [36.9 kB]
Get:14 http://archive.ubuntu.com/ubuntu disco-updates/main i386 Packages [182 kB]
Get:14 http://archive.ubuntu.com/ubuntu disco-updates/main i386 Packages [182 kB]
Get:14 http://archive.ubuntu.com/ubuntu disco-updates/main i386 Packages [182 kB]
Get:14 http://archive.ubuntu.com/ubuntu disco-updates/main i386 Packages [182 kB]
Get:14 http://archive.ubuntu.com/ubuntu disco-updates/main i386 Packages [182 kB]
Get:19 http://archive.ubuntu.com/ubuntu disco-updates/main amd64 Packages [210 kB]
Get:20 http://archive.ubuntu.com/ubuntu disco-updates/main Translation-en [82.8 kB]
Get:20 http://archive.ubuntu.com/ubuntu disco-updates/main Translation-en [82.8 kB]
Get:20 http://archive.ubuntu.com/ubuntu disco-updates/main Translation-en [82.8 kB]
Get:20 http://archive.ubuntu.com/ubuntu disco-updates/main Translation-en [82.8 kB]
Get:20 http://archive.ubuntu.com/ubuntu disco-updates/main Translation-en [82.8 kB]
Get:20 http://archive.ubuntu.com/ubuntu disco-updates/main Translation-en [82.8 kB]
Get:20 http://archive.ubuntu.com/ubuntu disco-updates/main Translation-en [82.8 kB]
Get:20 http://archive.ubuntu.com/ubuntu disco-updates/main Translation-en [82.8 kB]
Get:20 http://archive.ubuntu.com/ubuntu disco-updates/main Translation-en [82.8 kB]
Get:29 http://archive.ubuntu.com/ubuntu disco-updates/universe amd64 Packages [245 kB]
Get:29 http://archive.ubuntu.com/ubuntu disco-updates/universe amd64 Packages [245 kB]
Get:31 http://archive.ubuntu.com/ubuntu disco-updates/universe i386 Packages [242 kB]
Get:32 http://archive.ubuntu.com/ubuntu disco-updates/universe Translation-en [77.0 kB]
Get:33 http://archive.ubuntu.com/ubuntu disco-backports/universe Sources [1,160 B]
Get:34 http://archive.ubuntu.com/ubuntu disco-backports/universe amd64 Packages [3,144 B]
Get:35 http://archive.ubuntu.com/ubuntu disco-backports/universe i386 Packages [3,144 B]
Get:36 http://archive.ubuntu.com/ubuntu disco-security/main i386 Packages [137 kB]
Get:37 http://archive.ubuntu.com/ubuntu disco-security/main amd64 Packages [162 kB]
Get:38 http://archive.ubuntu.com/ubuntu disco-security/universe i386 Packages [209 kB]
Get:39 http://archive.ubuntu.com/ubuntu disco-security/universe Translation-en [52.5 kB]
Get:40 http://archive.ubuntu.com/ubuntu disco-security/universe amd64 DEP-11 Metadata [12.4 kB]
Get:41 http://archive.ubuntu.com/ubuntu disco-security/universe DEP-11 48x48 Icons [11.4 kB]
Get:42 http://archive.ubuntu.com/ubuntu disco-security/universe DEP-11 64x64 Icons [26.0 kB]
Get:43 http://archive.ubuntu.com/ubuntu disco-security/universe amd64 c-n-f Metadata [1,260 B]
Get:44 http://archive.ubuntu.com/ubuntu disco-security/multiverse i386 Packages [1,340 B]
Get:45 http://archive.ubuntu.com/ubuntu disco-security/multiverse amd64 Packages [1,172 B]
Get:46 http://archive.ubuntu.com/ubuntu disco-security/multiverse Translation-en [632 B]
Get:47 http://archive.ubuntu.com/ubuntu disco-security/multiverse amd64 c-n-f Metadata [116 B]
Reading package lists... Done
E: The repository 'http://ppa.launchpad.net/sun-java-community-team/sun-java6/ubuntu disco Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

[Mike Salvatore (mikesalvatore)]

Thanks for taking the time to report this bug and helping to make Ubuntu better. We appreciate the difficulties you are facing, but this appears to be a "regular" (non-security) bug. I have unmarked it as a security issue since this bug does not show evidence of allowing attackers to cross privilege boundaries nor directly cause loss of data/privacy. Please feel free to report any other bugs you may find.