pls is there anybody can help on disable on autocomplete in part number

pls is there anybody can help on disable on autocomplete in both invoice and quotes of part number, i am trying to operate the suitecrm in pad find it too diffculty to put the correct part number in, every time before i put my part number finish the form has already fatch and fullfil it. :sick: pls someone help, i spent the whole day in the issue but nothing come out.thanks for the care.