Visiting https://bookbrainz.org/author/312f9486-5d97-482a-834f-2777c785130f/edit returns a 500 error.
In the logs:

```
ERROR TypeError: Cannot read property 'id' of undefined
at author.aliasSet.author.aliasSet.aliases.map (/Users/Lenore/Work/Brainz/BookBrainz/bookbrainz-site/lib/server/routes/entity/author.js:120:23)
at Array.map (<anonymous>)
at authorToFormState (/Users/Lenore/Work/Brainz/BookBrainz/bookbrainz-site/lib/server/routes/entity/author.js:116:60)
at generateEntityProps (/Users/Lenore/Work/Brainz/BookBrainz/bookbrainz-site/lib/server/helpers/entityRouteUtils.js:145:17)
at router.get (/Users/Lenore/Work/Brainz/BookBrainz/bookbrainz-site/lib/server/routes/entity/author.js:193:112)
```