WebShop Duplicated Error Help!

[mori2005]

Hi i have webshop on my website and when i buy an item they give me many times the item that i buy help me plzz

this is the webshop script

Spoiler: Webshop

-- ### CONFIG ###
-- message send to player by script "type" (types you can check in "global.lua")
SHOP_MSG_TYPE = 19
-- time (in seconds) between connections to SQL database by shop script
SQL_interval = 30
-- ### END OF CONFIG ###
domodlib('repSystem')
function onThink(interval, lastExecution)
local result_plr = db.getResult("SELECT * FROM z_ots_comunication WHERE `type` = 'login';")
if(result_plr:getID() ~= -1) then
while(true) do
id = tonumber(result_plr:getDataInt("id"))
action = tostring(result_plr:getDataString("action"))
delete = tonumber(result_plr:getDataInt("delete_it"))
cid = getCreatureByName(tostring(result_plr:getDataString("name")))

if isPlayer(cid) == TRUE then
local itemtogive_id = tonumber(result_plr:getDataInt("param1"))
local itemtogive_count = tonumber(result_plr:getDataInt("param2"))
local container_id = tonumber(result_plr:getDataInt("param3"))
local container_count = tonumber(result_plr:getDataInt("param4"))
local add_item_type = tostring(result_plr:getDataString("param5"))
local add_item_name = tostring(result_plr:getDataString("param6"))
local received_item = 0
local full_weight = 0

if add_item_type == 'container' then
container_weight = getItemWeightById(container_id, 1)

if isItemRune(itemtogive_id) == TRUE then
items_weight = container_count * getItemWeightById(itemtogive_id, 1)
else
items_weight = container_count * getItemWeightById(itemtogive_id, itemtogive_count)
end
full_weight = items_weight + container_weight
else
full_weight = getItemWeightById(itemtogive_id, itemtogive_count)

if isItemRune(itemtogive_id) == TRUE then
full_weight = getItemWeightById(itemtogive_id, 1)
else
full_weight = getItemWeightById(itemtogive_id, itemtogive_count)
end
end

local free_cap = getPlayerFreeCap(cid)

if full_weight <= free_cap then
if add_item_type == 'container' then
local new_container = doCreateItemEx(container_id, 1)
local iter = 0
while iter ~= container_count do
doAddContainerItem(new_container, itemtogive_id, itemtogive_count)
iter = iter + 1
end
received_item = doPlayerAddItemEx(cid, new_container)
else
local new_item = doCreateItemEx(itemtogive_id, itemtogive_count)
received_item = doPlayerAddItemEx(cid, new_item)
end

rep.add(cid, 1)
if received_item == RETURNVALUE_NOERROR then
doPlayerSendTextMessage(cid, SHOP_MSG_TYPE, 'You received a '.. add_item_name ..' from World of Adventures - Website Shop.')
db.executeQuery("DELETE FROM `z_ots_comunication` WHERE `id` = " .. id .. ";")
db.executeQuery("UPDATE `z_shop_history_item` SET `trans_state`='realized', `trans_real`=" .. os.time() .. " WHERE id = " .. id .. ";")
else
doPlayerSendTextMessage(cid, SHOP_MSG_TYPE, ''.. add_item_name ..' from World of Adventures - Website Shop is waiting for you. Please make place for this item in your backpack/hands and wait about '.. SQL_interval ..' seconds to get it.')
end
else
doPlayerSendTextMessage(cid, SHOP_MSG_TYPE, ''.. add_item_name ..' from World of Adventures - Website Shop is waiting for you. It weight is '.. full_weight ..' oz., you have only '.. free_cap ..' oz. free capacity. Put some items in depot and wait about '.. SQL_interval ..' seconds to get it.')
end
end

if not(result_plr:next()) then
break
end
end
result_plr:free()
end
return TRUE
end