Ubuntu Studio 升级 mistmatch - 16.04 部分结束 20.04 dev

Question

我正在升级我的 ubuntu studio 16.04，经过两轮升级后，do-release-upgrade我得到：

1. 我的 conky 告诉我我仍然是 16.04.1。

2. cat /etc/*release

    DISTRIB_ID=Ubuntu
    DISTRIB_RELEASE=20.04
    DISTRIB_CODENAME=focal
    DISTRIB_DESCRIPTION="Ubuntu Focal Fossa (development branch)"
    NAME="Ubuntu"
    VERSION="20.04 LTS (Focal Fossa)"
    ID=ubuntu
    ID_LIKE=debian
    PRETTY_NAME="Ubuntu Focal Fossa (development branch)"
    VERSION_ID="20.04"
    HOME_URL="https://www.ubuntu.com/"
    SUPPORT_URL="https://help.ubuntu.com/"
    BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
    PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
    VERSION_CODENAME=focal
    UBUNTU_CODENAME=focal
   

3. cat /etc/lsb-release

    DISTRIB_ID=Ubuntu 
    DISTRIB_RELEASE=20.04 
    DISTRIB_CODENAME=focal
    DISTRIB_DESCRIPTION="Ubuntu Focal Fossa (development branch)"
   

有人能帮我理解我为什么会陷入这种困境以及如何解决它吗？一切似乎都正常。只是令人困惑。