The setup wizard wrote the legacy pinPeerName even though pinUserPeer is
the canonical key that outranks it in the resolver — so it had to scrub
the canonical key afterward to stop it winning. Write pinUserPeer directly
and migrate any legacy pinPeerName onto it on touch (setup load + clone),
which removes the precedence-fighting entirely.
Resolver still reads pinPeerName as a back-compat alias; that's deferred.