dream chalenger outfit

[Dogrinha]

I have a problem, I downloaded an ot server 8.6 with the dream chalenger quest, but I would like to know how do I get the player to have only one of 2 outfits. for example the player when making one outfit will not have the other. The scripts came ready but I don't know where I can find the answer to that.
otx2 version 8.6

local config =
{    storages = {bb = 15001, nk = 15002},
    documents = {7844, 7845, 7846},  -- follower, officer, leader
    rank = {15003, 15004},
    sstorages = {{15009, 15010}, 15011, 15012},
    outfits = {17,19}
}
function onUse(cid, item, fromPosition, itemEx, toPosition)
    if(getPlayerStorageValue(cid,config.storages.bb) < 1 and getPlayerStorageValue(cid,config.storages.nk) < 1) then
        doPlayerSendCancel(cid, "You are not allowed to use this thing.")
        return true;
    end
    if(not isInArray(config.documents, item.itemid)) then
        return true;
    end
    local a = getPlayerStorageValue(cid,config.storages.bb) == 1 and 1 or 2;
    local t=0;
    for i=1,#config.documents do
        if config.documents[i] == item.itemid then
            t = i;
            break;
        end
    end
    if(getPlayerStorageValue(cid,config.rank[a]) < t) then
        doPlayerSendCancel(cid, "You are not allowed to use this thing.")
        return true;
    end
    
    if(t==1) then--noobish way to do it
        if(getPlayerStorageValue(cid, config.sstorages[t][a]) == 1) then
            doPlayerSendCancel(cid, "You have already used this item.")
            return true;
        end
    else
        if(getPlayerStorageValue(cid, config.sstorages[t]) == 1) then
            doPlayerSendCancel(cid, "You have already used this item.")
            return true;
        end
    end
    doPlayerAddOutfitId(cid, config.outfits[a],t-1)
    if(t==1) then
        setPlayerStorageValue(cid,config.sstorages[t][a],1);
    else
        setPlayerStorageValue(cid,config.sstorages[t],1);
    end
    doRemoveItem(item.uid)
    return true
end

<outfit id="19" premium="yes">
        <list gender="0" lookType="279" name="Brotherhood"/>
        <list gender="1" lookType="278" name="Brotherhood"/>
    </outfit>

    <outfit id="17" premium="yes">
        <list gender="0" lookType="269" name="Nightmare"/>
        <list gender="1" lookType="268" name="Nightmare"/>
    </outfit>



local config = {
    small_diamond_id = 2145,
    documents = {7844, 7845, 7846},  -- follower, officer, leader
}
local levers = {
    [15051] = {pos = {x=32784,y=32229,z=14}, item = config.documents[1]},
    [15052] = {pos = {x=32782,y=32225,z=14}, item = config.documents[2]},
    [15053] = {pos = {x=32785,y=32223,z=14}, item = config.documents[3]},
    
    [15061] = {pos = {x=32836,y=32228,z=14}, item = config.documents[1]},
    [15062] = {pos = {x=32834,y=32224,z=14}, item = config.documents[2]},
    [15063] = {pos = {x=32837,y=32222,z=14}, item = config.documents[3]}
        }
function onUse(cid, item, fromPosition, itemEx, toPosition)
    if(item.itemid == 1945) then
        local diam = getTileItemById(levers[item.actionid].pos,config.small_diamond_id);
        if(diam.itemid < 10) then
            doPlayerSendCancel(cid, "You have to place a diamonc in order to use it.");
            return true;
        end
        
        doRemoveItem(diam.uid,1);
        doCreateItem(levers[item.actionid].item,1,levers[item.actionid].pos);
    end
    doTransformItem(item.uid,item.itemid==1945 and 1946 or 1945);
    return true;
end