我安装kalarm后出现了一些错误，如下所示，并kalarm表示无法创建第一个警报。现在“新”警报以及其他一些选项都呈灰色。尝试重置为默认值，也尝试删除并重新安装，但没有变化。
安装错误kalarm：
W: Target Packages (main/binary-amd64/Packages) is configured multiple times in /etc/apt/sources.list.d/google-chrome-beta.list:3 and /etc/apt/sources.list.d/google-chrome.list:3
W: Target Packages (main/binary-all/Packages) is configured multiple times in /etc/apt/sources.list.d/google-chrome-beta.list:3 and /etc/apt/sources.list.d/google-chrome.list:3
W: Target DEP-11 (main/dep11/Components-amd64.yml) is configured multiple times in /etc/apt/sources.list.d/google-chrome-beta.list:3 and /etc/apt/sources.list.d/google-chrome.list:3
W: Target DEP-11 (main/dep11/Components-all.yml) is configured multiple times in /etc/apt/sources.list.d/google-chrome-beta.list:3 and /etc/apt/sources.list.d/google-chrome.list:3
W: Target DEP-11-icons-small (main/dep11/icons-48x48.tar) is configured multiple times in /etc/apt/sources.list.d/google-chrome-beta.list:3 and /etc/apt/sources.list.d/google-chrome.list:3
W: Target DEP-11-icons (main/dep11/icons-64x64.tar) is configured multiple times in /etc/apt/sources.list.d/google-chrome-beta.list:3 and /etc/apt/sources.list.d/google-chrome.list:3
W: Target DEP-11-icons-hidpi (main/dep11/[email protected]) is configured multiple times in /etc/apt/sources.list.d/google-chrome-beta.list:3 and /etc/apt/sources.list.d/google-chrome.list:3
W: Target DEP-11-icons-large (main/dep11/icons-128x128.tar) is configured multiple times in /etc/apt/sources.list.d/google-chrome-beta.list:3 and /etc/apt/sources.list.d/google-chrome.list:3
W: Target CNF (main/cnf/Commands-amd64) is configured multiple times in /etc/apt/sources.list.d/google-chrome-beta.list:3 and /etc/apt/sources.list.d/google-chrome.list:3
W: Target CNF (main/cnf/Commands-all) is configured multiple times in /etc/apt/sources.list.d/google-chrome-beta.list:3 and /etc/apt/sources.list.d/google-chrome.list:3