每当我尝试从 apt-get 安装任何包时，都会出现此错误：
Setting up grub-pc (2.02~beta2-9ubuntu1.7) ...
ucfr: Corrupt registry: Duplicate entries for /etc/default/grub
grub-pc /etc/default/grub
grub-pc /etc/default/grub
grub-pc /etc/default/grub
grub-pc /etc/default/grub
dpkg: error processing package grub-pc (--configure):
subprocess installed post-installation script returned error exit status 4
Errors were encountered while processing:
grub-pc
E: Sub-process /usr/bin/dpkg returned an error code (1)
我检查了 /etc/default/grub 文件，没有发现任何重复条目。如果能提供任何帮助，我将不胜感激。
提前致谢