Fragsystem by GroupID

[Cloow]

Can someone please fix my broken script?

I have factions, faction 1 is used by group id 2 and faction 2 is used by group id 3
this script should make so if faction 1 kill faction 1 player he gets whiteskull and removes 1 "pvp token" but if he kills a faction 2 member he instead gain 1 pvp token and gets no skull.

This is my attempt.

local cfg = {
	rewardt1 =	4845, 
	rewardt2 = 9020,
}
local playerKiller = isPlayer(cid) and getPlayerGroupId(cid) 

function onKill(cid, target, lastHit) 
         if isPlayer(lastHit) and getPlayerGroupId(cid) == 2 then  
		 doPlayerAddItem(cid, cfg.rewardt1, 1) 
		 doSendAnimatedText(cid, 'FRAG +1', TEXTCOLOR_GOLD)
         elseif playerKiller == 2 then
		 doCreatureSetSkullType(cid, 3) 
		 doSendAnimatedText(cid, 'TEAM KILLER -1', TEXTCOLOR_RED)
		 elseif isPlayer(lastHit) and getPlayerGroupId(cid) == 3 then
		 doPlayerAddItem(cid, cfg.rewardt2, 1) 
		 doSendAnimatedText(cid, 'FRAG +1', TEXTCOLOR_GOLD)
		 elseif playerKiller == 3 then
		 doCreatureSetSkullType(cid, 3)
		 doSendAnimatedText(cid, 'TEAM KILLER -1', TEXTCOLOR_RED)
	end
return TRUE
end

This script will give 3x pvp tokens for killing a player with white skull and 5 for red and 8 for black. But im getting console error

local loot = 9020
Skulls = {}

Skulls[3] = {Skull = 3}

Skulls[4] = {Skull = 5}

Skulls[5] = {Skull = 8}
 
function onKill(cid, target, lastHit)
               doPlayerAddItem(cid, loot, Skulls[getCreatureSkullType(lastHit)].Skull)
				return true
end

Rep for the one who can fix up my scripts :>
I guess I need to disable skull system in config?