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61fd39e5d7
Update interacting_v3.md Making it clear to the user that keys created via the v2 API are not readable by the etcdctl with the v3 API. A etcdctl v3 get of a v2 key key exits with 0 and no data, which is quite confusing, hopefully this just makes that it a bit clearer if the user upgraded etcd 3 in the past (and forget some of the 2.3 to 3.0 to 3.1 to 3.2 upgrade details) but never updated the API they used as v2 was the default and happen to trying to figure out wtf, this is a further reminder of that backward incompatibility.