Failed Upgrade 16.3 core to 17 core: Unmet Dependencies

[Aravisian]

First, I would recommend checking your Sources.
If packages are conflicting, there may be a package source conflict.

[How To] address and manage Software Sources

In order to retrieve software packages for your computer, the apt software needs a source that supplies it. This is a security feature as sources are signed and vetted. It also is organizational, as it keeps things well organized and prevents conflicts. A source supplies the route to a Repository. Users can supply sources at will. For example a user might wish to install Wine, so they use curl to retrieve a built script to assign a source or use add-apt-repository to add one. However, this me…

Once all sources are corrected or verified, you should be able to successfully run the commands suggested by @Ponce-De-Leon and @337harvey:

sudo apt update && sudo apt full-upgrade

sudo dpkg --configure -a

sudo apt install --reinstall zorin-os-desktop