Since there were no further comments I went ahead as proposed and changed the first 10 relations.
If there are no complaints, I will do all others probably tomorrow in about 24 h.
I’m not sure what you meant with the duplicates? The list contains the relation IDs and I double checked that they are unique.
E.g. for line 700 there’s a route_master parent relation Paris ↔ London with superroute children Paris → London and London → Paris, which in turn have route children. Maybe those look like duplicates on first glance?