我已经将 Ubuntu 从 20.04 升级到 22.04，但升级似乎未成功完成。当我尝试安装新软件包时，例如：sudo apt install virtualenv我收到以下错误：
Do you want to continue? [Y/n] y
Setting up cron (3.0pl1-137ubuntu3) ...
Installing new version of config file /etc/crontab ...
dpkg: error processing package cron (--configure):
unable to install '/etc/crontab.dpkg-new' as '/etc/crontab': Operation not permitted
Errors were encountered while processing:
cron
needrestart is being skipped since dpkg has failed
E: Sub-process /usr/bin/dpkg returned an error code (1)
无论哪个包都会出现此错误。我已关注其他问题并检查了权限/etc/cron.d，root可以访问所有权限，我甚至可以创建一个新的cron job并触发它，但是当安装新包时，错误仍然存在。我已经检查过systemctl，cron服务处于活动状态并运行良好。
● cron.service - Regular background program processing daemon
Loaded: loaded (/lib/systemd/system/cron.service; enabled; vendor preset: enabled)
Active: active (running) since Wed 2023-02-15 14:56:10 UTC; 17min ago
Docs: man:cron(8)
Main PID: 59355 (cron)
Tasks: 185 (limit: 18962)
Memory: 114.7M
CPU: 317ms
CGroup: /system.slice/cron.service
安装过程中可能出现什么问题导致出现此问题？
更新：
问题仍然存在，但是我注意到 @steelworker 和 @jos 建议后发生了变化。现在，当我尝试安装时，错误是另一个错误：
Do you want to continue? [Y/n] y
Setting up cron (3.0pl1-137ubuntu3) ...
chown: changing ownership of '/var/spool/cron/crontabs':
Operation not permitted
dpkg: error processing package cron (--configure):
installed cron package post-installation script subprocess
returned error exit status 1
Errors were encountered while processing:
执行sudo ls -la /var/spool/cron/crontabs结果是：
total 12
drwx-wx--T 2 root crontab 4096 Nov 14 2021 .
drwxr-xr-x 5 root root 4096 Oct 26 2020 ..
-rw------- 1 git crontab 250 Nov 14 2021 git
并返回上一级的内容：
drwxr-xr-x 5 root root 4096 Oct 26 2020 .
drwxr-xr-x 4 root root 4096 Oct 26 2020 ..
drwxrwx--T 2 daemon daemon 4096 Oct 26 2020 atjobs
drwxrwx--T 2 daemon daemon 4096 Nov 12 2018 atspool
drwx-wx--T 2 root crontab 4096 Nov 14 2021 crontabs