Function stale_conflict 

async fn stale_conflict(
    io: &dyn WalObjectIo,
    object_seq: u64,
    epoch: u64,
    conflict: Error,
) -> Result<PutResult>

Resolves a create of this store’s epoch that met a different object: an object of an earlier epoch can never be on the chain, so the create fails like a transient error; an object of the same or a later epoch belongs to another writer and conflict is returned.