Neo4j accidental upgrade from 4.4 to 5.3?

Does Neo4j get updated/upgraded when using APT-GET?

My server stated some updates were required and I just ran apt-update or perhaps apt-upgrade by accident... could this have upgraded Neo4j and my database as well?

I now can't restart it it from the command line and I can see indications that i am now on 5.3 from various error messages when using neo4j start --verbose or neo4j status --verbose :disappointed:

@jonomac

https://www.freecodecamp.org/news/sudo-apt-get-update-vs-upgrade-what-is-the-difference/ describes usage of apt-get update and apt-get upgrade

but also Neo4j 5 requires Java 17 unlike Neo4j 4 which requires Java 11. so maybe this is the cause for it not starting\

OK, thank you for the clarification Dana, I will investigate whether this is the issue, many thanks.