update system periodically

[coreyh@free.fr]

Hi list,

I have been running an old debian 11 for many days.
is it safe to run 'apt upgrade' and 'apt update' periodically?
for example put them into crontab.

I ask this question because I am worried that some software updates may 
conflict with each other after running in this way, resulting in system 
unavailability.

Thank you.

--
corey hickman