This was reported here: [Anki 23.10 Beta 1] ANKI_MINOR = int(ANKI_VERSION.split(“.”)[-1])
Also see this for the fix: [Anki 23.10 Beta 1] Backup failed and modified_in_python - #3 by abdo
That’s how Anki is versioned now: Change Anki's version scheme; bump to 23.09 by dae · Pull Request #2640 · ankitects/anki · GitHub