1. Build Android app.
2. Send collapsible notifications.
3. Ensure that they are correctly collapsed.
4. Open MariaDB shell and execute `select * from olm_sessions;`. Ensure that the version of the last session is not incrementing with each collapsible notification.
5. Go to `version-utils.js` and change `FUTURE_CODE_VERSION` to 0.
6. Repeate 2 and 3.
7. Open MariaDB shell and execute `select * from olm_sessions;`. Ensure that the version of the last session is incrementing with each collapsible notification.