胜利发生后，SteamBot崩溃

I have an issue with a SteamBot I have recently set up to handle deposits and winnings for a CS:GO Gambling site. It works well for depositing and sending trade offers for the first couple of minutes, before throwing me this error:

C:\Users\Frederik\Desktop\bot
ode_modules\mysql\lib\protocol\Parser.js:82
        throw err;
              ^
Error: number format error: empty string
    at Error (native)
    at Function.Long.fromString (C:\Users\Frederik\Desktop\bot
ode_modules\steam-tradeoffers
ode_modules\long\dist\Long.js:180:19)
    at toAccountId (C:\Users\Frederik\Desktop\bot
ode_modules\steam-tradeoffers\index.js:376:15)
    at SteamTradeOffers.makeOffer (C:\Users\Frederik\Desktop\bot
ode_modules\steam-tradeoffers\index.js:396:42)
    at Query._callback (C:\Users\Frederik\Desktop\bot\sell.js:160:13)
    at Query.Sequence.end (C:\Users\Frederik\Desktop\bot
ode_modules\mysql\lib\protocol\sequences\Sequence.js:96:24)
    at Query._handleFinalResultPacket (C:\Users\Frederik\Desktop\bot
ode_modules\mysql\lib\protocol\sequences\Query.js:144:8)
    at Query.EofPacket (C:\Users\Frederik\Desktop\bot
ode_modules\mysql\lib\protocol\sequences\Query.js:128:8)
    at Protocol._parsePacket (C:\Users\Frederik\Desktop\bot
ode_modules\mysql\lib\protocol\Protocol.js:271:23)
    at Parser.write (C:\Users\Frederik\Desktop\bot
ode_modules\mysql\lib\protocol\Parser.js:77:12)

I have searched everywhere for the solution to this, however haven't managed to find anything. Any help or solutions would be very much appreciated! I am unsure as to what piece of code may be causing the issue, so here is a pastebin with the whole lot of it: http://pastebin.com/x9YkhkCX

Thank you!

At a glance I would assume that partnerSteamId: row[i].userid is your problem. Check to make sure that row[i].userid is not null or an empty string.