Hi Chkung!

To answer your question, it is not possible to open a Chest that is already open. Normally open chests are automatically removed from your inventory, if you receive an open chest or are unable to remove it from your inventory, please submit a ticket to our ticket platform with your account details and a brief explanation of the issue you encountered.

Ticket platform: http://support.playwithi.com/index.php?/Tickets/Submit


Have a good one!

Seal Online B.O.D.