将系统由CentOS Linux release 7.6.1810升级至BCLinux-for-Euler-22.10报错，环境检查及升级前检查均正常通过，但升级过程中报错如下：
[ INFO ] - [initramfs]: =================== Upgrade Stage ==================
[ INFO ] - [initramfs]: the stage start time is: 2024-05-13-10:07:05
[ INFO ] - [initramfs]: start install openEuler dnf
已加载插件：fastestmirror, langpacks, priorities
您已启用软件包 GPG 签名检查，这样很好。不过您尚未安装任何 GPG 公钥。请下载您希望安装的软件签名公钥并安装。假设公钥已下载，安装命令是：
rpm --import public.gpg.key
或者，在软件源配置中，使用 ‘gpgkey’ 选项指定软件源使用的公钥 URL，这样 yum 会自动安装它。
详情请联系发行版或软件包制作人。
问题源：everything
[ ERROR ] - [initramfs]: failed to install rpms required by dnf.
[ ERROR ] - [initramfs]: install dnf failed
[ ERROR ] - [initramfs]: failed to upgrade system.
[ ERROR ] - [x2openEuler-upgrade] - failed to upgrade system
[ ERROR ] - [centos2openEuler]: Upgrade migrate failed
2
##THE END##
请大佬指点！