https://community.teamviewer.com/English/discussion/92029/~/English/categories/community-blog-en
http://LnxRelease-02/deb in Ubuntu software sources after installing TeamViewer - TeamViewer...
According to THIS AskUbuntu question (i'm the author), http://LnxRelease-02/deb is added to sotware sources after installing TeamViewer, which is a bug.
software sourceshttpdeb