Process-engine.mv.db file

Hi, i was wondering what’s the purpose of Process-engine.mv.db file
i have an old linux container for camunda V.7.15.0, and today i created a new container as well with same version and i noticed that camunda-h2-dbs folder and the file inside it process-engine.mv.db are missing from my old container (I have them on the new Container).

what is the purpose of that file?
is it normal to be missing?