multithreading issue with output

[mr_byte31]

My script is working correctly when i have only one thread.
when I make 50 threads, the output result in 'table' seems to have missing entries in each row ! for example column 'Average Volume' sometimes have missing results for some index. this issue is sporadic !
I am sure that each thread write in different index i.e the threads doesn't overwrite each others !

table = pd.DataFrame(index =tickers,columns = some_columns)

def processData(q,table):
    while not q.empty():
        ticker = q.get()
        #
        if  bad_condition:
            q.task_done()
            continue
              
        try:
                if bad_condition:
                    q.task_done()
                    continue
                
#######A lot of code here               
                

                table.loc[ticker,'Price']=lastPrice
                table.loc[ticker,'Shares Outstanding']=sharesOutstanding
                table.loc[ticker,'Capital']=Capital
                table.loc[ticker,'Average Volume']=averageVolume
                
        except urllib.error.HTTPError:
            print(ticker,'doesnt exist on yahoo finance')
        except urllib.error.URLError:
            print(ticker,'yahoo finance has issue')
        q.task_done()
    return True

num_theads = 50
q = Queue(maxsize=0)
for ticker in table.index:
    q.put(ticker)
for i in range(0,num_theads):
    worker = Thread(target=processData, args=(q,table))
    worker.setDaemon(True)
    worker.start()    
q.join()
table.to_csv('result.csv')