The bool column in new table should have 3 status

Say I have 2 bool column in new table;
is change order and is buyback order.
and "isBuybackOrder" with initial value null,
and "isReplacementOrder" with initial false,

when click isBuybackOrder twice, the triangle not disappear as except.


So I think the status of bool should hold 3 status - false, true, null.