Duplicate Atco Code used on rail stations.

(correct)
https://www.openstreetmap.org/node/5469622521
Name: Limehouse
Atco Code: 9100LIMHSE
Source: Naptan

(incorrect)
https://www.openstreetmap.org/node/5469620129
Name: Limehouse DLR
Atco Code: 940GZZDLLIM,
Source: TFL data
