the pyside2-uic generate incorrect python code

I'am using Qt designer to design UI, then
pyside2-uic ./source/mainwindow.ui -o ./template/ui_mainwindow.py
but the python code is incorrect:

self.scrollArea.setObjectName(u"scrollArea")
self.scrollArea.setGeometry(QRect(0, 0, 1131, 771))
self.scrollArea.setWidgetResizable(True)
self.scrollAreaWidgetContents = QWidget()
self.scrollAreaWidgetContents.setObjectName(u"scrollAreaWidgetContents")
self.scrollAreaWidgetContents.setGeometry(QRect(0, 0, 1129, 769))
self.verticalLayoutWidget = QWidget(self.scrollAreaWidgetContents)
self.verticalLayoutWidget.setObjectName(u"verticalLayoutWidget")
self.verticalLayoutWidget.setGeometry(QRect(0, 0, 1121, 771))
self.verticalLayout = QVBoxLayout(self.verticalLayoutWidget)
self.verticalLayout.setObjectName(u"verticalLayout")
self.verticalLayout.setContentsMargins(0, 0, 0, 0)
self.scrollArea.setWidget(self.scrollAreaWidgetContents)

when i use the above code, the scrollbar was invalid, so i change it to this:

self.scrollArea = QScrollArea(self.data_tab)
self.scrollArea.setObjectName(u"scrollArea")
self.scrollArea.setGeometry(QRect(0, 0, 1131, 771))
self.scrollArea.setWidgetResizable(True)
self.scrollAreaWidgetContents = QWidget()
self.scrollAreaWidgetContents.setObjectName(u"scrollAreaWidgetContents")
self.scrollAreaWidgetContents.setGeometry(QRect(0, 0, 1129, 769))
# self.verticalLayoutWidget = QWidget(self.scrollAreaWidgetContents)
# self.verticalLayoutWidget.setObjectName(u"verticalLayoutWidget")
# self.verticalLayoutWidget.setGeometry(QRect(0, 0, 1121, 771))
self.verticalLayout = QVBoxLayout(self.scrollAreaWidgetContents)
self.verticalLayout.setObjectName(u"verticalLayout")
self.verticalLayout.setContentsMargins(0, 0, 0, 0)
self.scrollArea.setWidget(self.scrollAreaWidgetContents)

the pyside2-uic generate a superfluous widget