Letzte Race Checkpoint entfernen

Hallo ich habe eine blockade und zwar habe ich ein Fahrschulsystem gemacht mit checkpoint nun wen ich in den letzten fahre soll es verschwinden also es soll keine checkpoins auf der karte bleiben...

public OnPlayerEnterRaceCheckpoint(playerid)
{

if(FSBpru[playerid] == 1)
{
SetPlayerRaceCheckpoint(playerid,0,762.5875,-1396.9618,12.9382,714.8621,-1398.8812,12.9497,4.0);
//778.3553,-1403.0804,13.0967

FSBpru[playerid] = 2;
}
else if(FSBpru[playerid] == 2)
{
SetPlayerRaceCheckpoint(playerid,0,714.8621,-1398.8812,12.9497,702.3405,-1397.9149,12.9469,4.0);
FSBpru[playerid] = 3;
}
else if(FSBpru[playerid] == 3)
{
SetPlayerRaceCheckpoint(playerid,0,702.3405,-1397.9149,12.9469,619.1613,-1396.5576,12.9336,4.0);
FSBpru[playerid] = 4;
}
else if(FSBpru[playerid] == 4)
{
SetPlayerRaceCheckpoint(playerid,0,619.1613,-1396.5576,12.9336,508.0245,-1442.9784,14.3349,4.0);
FSBpru[playerid] = 5;
}
else if(FSBpru[playerid] == 5)
{
SetPlayerRaceCheckpoint(playerid,0,508.0245,-1442.9784,14.3349,504.4375,-1561.8711,16.0853,4.0);
FSBpru[playerid] = 6;
}
else if(FSBpru[playerid] == 6)
{
SetPlayerRaceCheckpoint(playerid,0,504.4375,-1561.8711,16.0853,530.3690,-1647.2054,17.4316,4.0);
FSBpru[playerid] = 7;
}
else if(FSBpru[playerid] == 7)
{
SetPlayerRaceCheckpoint(playerid,0,530.3690,-1647.2054,17.4316,376.2037,-1645.5632,32.2847,4.0);
FSBpru[playerid] = 8;
}
else if(FSBpru[playerid] == 8)
{
SetPlayerRaceCheckpoint(playerid,0,376.2037,-1645.5632,32.2847,367.7625,-1738.0311,17.1863,4.0);
FSBpru[playerid] = 9;
}
else if(FSBpru[playerid] == 9)
{
SetPlayerRaceCheckpoint(playerid,0,0367.7625,-1738.0311,17.1863,367.3512,-2006.0902,7.2376,4.0);
FSBpru[playerid] = 10;
}
else if(FSBpru[playerid] == 10)
{
SetPlayerRaceCheckpoint(playerid,0,367.3512,-2006.0902,7.2376,372.2804,-1949.2374,7.2368,4.0);
FSBpru[playerid] = 11;
}
else if(FSBpru[playerid] == 11)
{
SetPlayerRaceCheckpoint(playerid,0,372.2804,-1949.2374,7.2368,372.6416,-1646.9117,32.2878,4.0);
FSBpru[playerid] = 12;
}
else if(FSBpru[playerid] == 12)
{
SetPlayerRaceCheckpoint(playerid,0,372.6416,-1646.9117,32.2878,332.6599,-1627.5834,32.6358,4.0);
FSBpru[playerid] = 13;
}
else if(FSBpru[playerid] == 13)
{
SetPlayerRaceCheckpoint(playerid,0,332.6599,-1627.5834,32.6358,445.4463,-1463.2883,29.8395,4.0);
FSBpru[playerid] = 14;
}
else if(FSBpru[playerid] == 14)
{
SetPlayerRaceCheckpoint(playerid,0,445.4463,-1463.2883,29.8395,553.2454,-1417.3052,14.9158,4.0);
FSBpru[playerid] = 15;
}
else if(FSBpru[playerid] == 15)
{
SetPlayerRaceCheckpoint(playerid,0,553.2454,-1417.3052,14.9158,713.8146,-1406.4976,12.9374,4.0);
FSBpru[playerid] = 16;
}
else if(FSBpru[playerid] == 16)
{
SetPlayerRaceCheckpoint(playerid,0,713.8146,-1406.4976,12.9374,792.9424,-1405.6652,12.9108,4.0);
FSBpru[playerid] = 17;
}
else if(FSBpru[playerid] == 17)
{
SetPlayerRaceCheckpoint(playerid,0,792.9424,-1405.6652,12.9108,799.6138,-1334.0707,12.9489,4.0);
FSBpru[playerid] = 18;
}
else if(FSBpru[playerid] == 18)
{
SetPlayerRaceCheckpoint(playerid,0,799.6138,-1334.0707,12.9489,798.9209,-1354.3506,13.3828,4.0);
FSBpru[playerid] = 19;
}
else if(FSBpru[playerid] == 18)
{
SetPlayerRaceCheckpoint(playerid,0,798.9209,-1354.3506,13.3828,778.8714,-1328.9722,13.5469,4.0);
FSBpru[playerid] = 19;
}
else if(FSBpru[playerid] == 18)
{
SetPlayerRaceCheckpoint(playerid,0,778.8714,-1328.9722,13.5469,748.1023,-1341.6055,13.5248,4.0);
FSBpru[playerid] = 19;
}
else if(FSBpru[playerid] == 19)
{
SetPlayerRaceCheckpoint(playerid,1,748.1023,-1341.6055,13.5248,0,0,0,4.0);
FSBpru[playerid] = 20;
}
else if(FSBpru[playerid]== 20)
{
SendClientMessage(playerid,Achtung,"Du hast die Prüfung besanden. Nun erhältst du dein Führerschein : Klasse A");
IstSpielerPrufung[playerid] = false;
SetPVarInt(playerid,"FAschein",1);
DestroyVehicle(GetPlayerVehicleID(playerid));
DisablePlayerCheckpoint(playerid);
FSBpru[playerid] = 21;
}
return 1;
}

es verschwindet nicht