Multiple use of a void OnStart, need help D:

[KeysOfMyMind]

void OnStart()
{
AddUseItemCallback("", "crowbar_1", "mansiondoor1", "UsedCrowbarOnDoor", true);
AddEntityCollideCallback("crowbar_joint_1", "ScriptArea_Joint", "CollideAreaBreakDoor", true, 1);
}


void UsedCrowbarOnDoor(string &in asItem, string &in asEntity)
{
AddTimer("", 0.2, "TimerSwitchShovel");
RemoveItem("crowbar_1");
}


void TimerSwitchShovel(string &in asTimer)
{
PlaySoundAtEntity("","puzzle_place_jar.snt", "", 0, false);
SetEntityActive("crowbar_joint_1", true);
}


void CollideAreaBreakDoor(string &in asParent, string &in asChild, int alState)
{
AddPlayerSanity(25);
PlayMusic("10_puzzle01.ogg", false, 0.7, 0.1, 10, false);
SetSwingDoorLocked("mansiondoor1", false, true);
AddPropImpulse("mansiondoor1", 0, 0, -50, "World");
SetSwingDoorDisableAutoClose("mansiondoor1", true);
SetSwingDoorClosed("mansiondoor1", false, false);
SetMoveObjectState("mansiondoor1", 1);
PlaySoundAtEntity("","break_wood_metal", "ScriptArea_Dust", 0, false);
CreateParticleSystemAtEntity("", "ps_hit_wood", "ScriptArea_Dust", false);
SetEntityActive("crowbar_joint_1", false);
SetLocalVarInt("Door", 1);
}

void Scare()
{
AddEntityCollideCallback("Player", "push", "Push", true, 1);
AddEntityCollideCallback("Player", "door_slam", "Slam", true, 1);
}


void Push(string &in asParent, string &in asChild, int alState)
{
PlaySoundAtEntity("", "react_pant.snt", "push", 0, false);
AddPlayerBodyForce(300000, 0, 0, false);
}


void Slam(string &in asParent, string &in asChild, int alState)
{
SetSwingDoorClosed("mansiondoor1", true, true);
SetSwingDoorLocked("mansiondoor1", true, true);
PlaySoundAtEntity("", "00_laugh.snt", "door_slam", 0, false);
}