Guidance Needed for Upgrading Traccar from Version 5.12 to 6.x

Hi everyone,

I need assistance with upgrading my current Traccar installation from version 5.12 to the latest 6.x version.

Here's my setup:

I have modified the UI using IntelliJ IDEA on my Mac.
Traccar is installed on a VPS running Ubuntu.
I have already backed up the following:
Traccar database
traccar.xml configuration file
Media files
My question:
Do I need to back up anything else to ensure my custom UI modifications are preserved during the upgrade?

Thanks in advance for your help!

If you changed the code, you have to re-apply or merge those changes.

Ok, so I have to build modern folder again from my old project?

You have to reapply the changes and build the new version, not old.

Thank you very much Anton for your guidance.