Data removed when you are inactive

• Tycoon, vaults: a vault slot's contents are deleted if that slot isn't used for 90 days.
• Survival Mix, claims: if every leader and admin of a claim hasn't logged in to Survival Mix for more than 90 days in a row, other players may ask for a takeover or regeneration in a ticket. The owners are contacted first through their linked Discord or in-game mail.

To stay safe, log in to that server and open your vault within 90 days. The full rules are on the rules page.