[Koha] Koha 3.14: Item's ''Lost Status'' does not retain after Save changes

I need an urgent help! In cataloging, The ''Lost status'' does not retain after Save changes. I want to change the Lost status to a value in drop-down box in editing the item's record Any advice please. Harsha Balasooriya Senior Assistant Librarian, System The Open University of Sri Lanka Tel: 011-2881030