Cannot install packages from oracular-backports

I use Kubuntu 24.10 Minimal, I was trying to get the libreoffice backport from oracular-backports by inputting the following command: sudo apt-get install -t oracular-backports libreoffice However, doing so resulted in the following error: E: The value 'oracular-backports' is invalid for APT::Default-Release as such a release is not available in the sources I followed this article , specifically the second option of manually installing backports, I even made sure my release name was oracular by inputting the following: lsb_release -cs sure enough, the output was oracular, have I done something wrong? EDIT: Someone suggested to add the contents of cat /etc/apt/sources.list /etc/apt/sources.list.d/* | grep -v '^#', so here it goes: deb [signed-by=/etc/apt/keyrings/packages.mozilla.org.asc] https://packages.mozilla.org/apt mozilla main Types: deb URIs: http://archive.ubuntu.com/ubuntu Suites: oracular oracular-updates oracular-backports Components: main universe restricted multiverse Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg Types: deb URIs: http://security.ubuntu.com/ubuntu/ Suites: oracular-security Components: main universe restricted multiverse Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg deb [signed-by=/usr/share/keyrings/waydroid.gpg] https://repo.waydro.id/ oracular main Looking at it, I might have to remove some 3rd party repos