Qt::ItemIsDropEnabled ignored in dragDropMode QAbstractItemView::InternalMove

[cheche]

i have a QTreeWidget that looks like this:

dragDropMode is QAbstractItemView::InternalMove
my problem is, that e.g. Row 2 can be dropped at Row 1 although Row 1 misses Qt::ItemIsDropEnabled:


i just want the user to be able to move the items up/down by drag/drop but not to drop one item at another