Group and classical music

[Tristram]

Dear all, this is a real SOS for grouping my classical music tracks. I lost my previous configuration that did exactly what i wanted. I tried to use ChatGPT and i can say it led nowhere.
In Title, i have catalogue reference RV 486, for example for a Vivaldi Track
In movement, i have 1. Allegro or 2. Andante
Tracks are consecutive and can be over multiple discs for opera for example.
When i browse my database, i would like when i click on an album to see RV 486 as a group. And when i play RV 486, get the three tracks related to this work in my playlist.
My minimserver is on a synology server. I tried to create an update.txt because i can't find the right line to create group on the web interface. But honestly i am nowhere and the documentation of the user guide is not more explicit on where and how to create groups.
Thank for your help, i gave up after 6 hours of tries