When any handler is removed, all handler indices higher that the deleted one should be decremented.
Used In
Arma3
Example
removeMissionEventHandler ["Draw3D",1];
for "_i" from 0 to 4 do {
missionNamespace setVariable [
format ["handler%1",_i],addMissionEventHandler ["Loaded","hint ""_i"";"]];
};
removeMissionEventHandler ["Loaded",handler2]; //Remove the third index under type "Loaded"