Favourites remembered from last year

[hugovk]

I'm submitting a ... (check one with "x")
[x] bug report
[ ] feature request
[ ] support request => Please do not submit support requests here, use one of these channels: https://forum.ionicframework.com/ or http://ionicworldwide.herokuapp.com/

Current behavior:

Some talks are favourited for 2024, even though the schedule has just come out and I've not added any yet this year.

Expected behavior:

New year, new schedule, new empty favourites list.

Steps to reproduce:

1. Use the app in 2023.
2. Add some talks as favourites using the star.
3. Enjoy the conference.
4. Wait a year.
5. Use the app in 2024.
6. Some of the talks and sessions seem randomly starred. Maybe it's reading data from last year?

Same phone, didn't uninstall in between.

Other information:

Maybe I should just go through and remove the old ones? Or can they be programmatically removed? Maybe something for next year in case we don't want to wipe new stars people have really added for 2024.