1. Build desktop app.
2. Send a couple of notifications (visual and badge only). Ensure that they are displayed/ badge icon is updated. Ensure that no session in `olm_sessions` table in MariaDB increments its version.
3. Update `NEXT_CODE_VERSION` -> 0.
4. Repeat step 2. This time ensure that there is an entry in `olm_sessions` table that increments its version with each notification. Obviously ensure that notifications are working correctly (displayed in decrypted form and updating badge icon).
5. Finally, bring `NEXT_CODE_VERSION` back to its original value and repeat step 2. Ensure that notifications work correctly but the session that was incrementing its version in step 4 doesn't do so anymore.