@rfc2822 My case leading to data loss.
- VPS1 with owncloud (calendar+contacts).
- Smartphone, synchronized with VPS1
- Some new contacts and calendar events, not yet synchronized.
- VPS1 was removed.
- VPS2 was created (as clone of VPS2).
- Created new account ICSx⁵ and got duplicates.
- Removed old account.
- Not yet synchronized data was lost.