Requested here: https://en.wikipedia.org/wiki/Wikipedia:Page_Curation/Suggested_improvements#61._Articles_to_go_back_into_NPR_queue_when_overwritten
Proposal was supported unanimously here: https://en.wikipedia.org/wiki/Wikipedia:Village_pump_(miscellaneous)/Archive_57#Flagging_overwriting_of_articles
(see that section for more info)
There were some technical hurdles relating to task T36912 that might need to be overcome. See discussion here: https://en.wikipedia.org/wiki/Wikipedia:Village_pump_(technical)/Archive_162#Flagging_overwriting_of_articles