Unfortunately, these edits have completely broken lots of other features such as https://www.openstreetmap.org/relation/11271488/history , https://www.openstreetmap.org/relation/4035125 etc.  As the mapper here has left this course entirely now - see https://www.openstreetmap.org/#map=17/51.62132/0.14164&layers=D - I'll revert these.
As a general rule of thumb it is NOT OK to delete everything and remap.  Details from the previous mapping will be inevitably lost, and history is also lost.
