ok so what i did i imported one-month-old database and exported the widgets from that and then imported it to my current database. this is what the only solution.
thanks for your answer, ok lets say table are added correctly from wikipedia, then will that table be updated automatically when there is any changes made in wikipedia table?
yeah i have checked it too, brother urls are not different, open the second url you will see its redirected to the first one =) but duplications occurs