Welcome and thank you for your contributions. 

When things change in the real world, editors are empowered to be bold and edit the map to reflect the current situation. But be aware that OpenStreetMap stores the editing history of an element and it is generally worth taking a few extra steps to help preserve this history. For example, instead of deleting elements such as buildings or landuse and redrawing them anew, it is generally better to update the geometry of the existing objects, retaining their editing history. 

See https://wiki.openstreetmap.org/wiki/Keep_the_history for more informaton.