Their inability to understand that they cannot weight bear is not going to change. Carers have been trying to change that for decades and nothing works; they still try to stand up, walk and fall down.
There are four choices: walking with two people in forearm supportive frames, over sedation, falling down or keeping them busy.
Distractions with seated activities or wheeling them around to various locations in and out of doors may produce a slight decrease in falls. After walking, seated activities are more apt to capture and sustain their attention.