Lua got bug on this script

[Lbtg]

Hello i got error on this script can someone please check it and maybe fix

Script:

local t = {
    39002, {
    [20] = {2160, 5, "Congratulations, you have achieved one of four goals! You have been awarded with 5 crystal coints!", 1},
    [50] = {2160, 20, "Congratulations, you have achieved two of four goals! You have been awarded with 20 crystal coints!", 2},
    [80] = {2160, 35, "Congratulations, you have achieved three of four goals! You have been awarded with 35 crystal coints!", 3},
    [100] = {2160, 100, "Congratulations, you have achieved three of four goals! You have been awarded with 100 crystal coints!", 4},
    [150] = {2157, 2, "Congratulations, you have achieved three of four goals! You have been awarded with 2 Gold Nuggets!", 5},
    [180] = {12601, 10, "Congratulations, you have achieved three of four goals! You have been awarded with 10 Time Traveler Feathers!", 6},
    [200] = {6527, 100, "Congratulations, you have achieved three of four goals! You have been awarded with 100 Game Tokens!", 7},
    [250] = {7529, 1, "Congratulations, you have achieved three of four goals! You have been awarded with 3 hours experience boost paper!", 8},
    [300] = {2366, 1, "Congratulations, you have achieved all four goals! You have been awarded with 1 Stamina Feather!", 9}
    }
}
function onAdvance(cid, skill, oldlevel, newlevel)
    if skill == SKILL__LEVEL then
        for level, v in pairs(t[2]) do
            if oldlevel < level and getPlayerLevel(cid) >= level and getPlayerStorageValue(cid, t[1]) < v[9] then
                doPlayerAddItem(cid, v[1], v[2])
                doPlayerSendTextMessage(cid, MESSAGE_EVENT_ADVANCE, v[3])
                setPlayerStorageValue(cid, t[1], v[9])
            end
        end
    end
    doPlayerSave(cid, true)
    return true
end

[10:45:45.816] [Error - CreatureScript Interface]
[10:45:45.816] data/creaturescripts/scripts/reward45.lua:onAdvance
[10:45:45.816] Description:
[10:45:45.816] data/creaturescripts/scripts/reward45.lua:17: attempt to compare number with nil
[10:45:45.816] stack traceback:
[10:45:45.816]  data/creaturescripts/scripts/reward45.lua:17: in function <data/creaturescripts/scripts/reward45.lua:14>

 

[Limos]

Change v[9] to v[4].
The numbers stand for the position in the table, so v[1] is the itemid, v[2] the count, v[3] the textmessage and v[4] the storagevalue. It only has 4 values in the table so v[9] is nil.