My apologizes. I am not using 4.1 - still on 3.11+ but what did occur to me is I use the Recomplete plug-in https://moodle.org/plugins/local_recompletion/ which has the Reset feature.
The old fashion way of course would be to deselect the activity completion from Course Admin>Reports>Activity Completion and if there was a quiz activity, delete the attempt from the quiz>Responses view.
Kind Regards
The old fashion way of course would be to deselect the activity completion from Course Admin>Reports>Activity Completion and if there was a quiz activity, delete the attempt from the quiz>Responses view.
Kind Regards