Redefining a trigger code seems to inherit from the base definition instead of replace.

[Adam Biser]

    trigger 92
    {
        action = "Door_Open";
        arg1 = 16;
        arg2 = 300;
        arg3 = 0; // without this line, the door remains "locked" as if arg3 = 1 like in wolf definition
        playeruse = true;
        monsteruse = true;
        repeatable = true;
        activatenorth = false;
        activatesouth = false;
    }

To remove the elevator switch trigger, I needed to do:

    trigger 21
    {
        action = "";
        playeruse = false;
        activateeast = false;
        activatewest = false;
        activatenorth = false;
        activatesouth = false;
    }

but expected to only need this

    trigger 21 { }

‌