As of late, the urls are broken for about 60 wikis. It seems something chopped the subdomain part to be 2 characters, which is arbitrary and wrong and breaks urls and/or makes them point to unrelated wikis;
Example:
```
cewiki ce.wikipedia.org
cebwiki ce.wikipedia.org
..
chwiki ch.wikipedia.org
chrwiki ch.wikipedia.org
chywiki ch.wikipedia.org
..
ganwiki ga.wikipedia.org
gagwiki ga.wikipedia.org
gawiki ga.wikipedia.org
```
Affected tools end up linking to either broken domains, or linking to the same domain twice with some computing an incorrect result.
See also:
* {T142759}
* Downstream: [issue mw-tool-orphantalk#5 Wikis missing and/or duplicated.](https://github.com/Krinkle/mw-tool-orphantalk/issues/5)
* https://tools.wmflabs.org/orphantalk/
```lang=sql
-- MariaDB [meta_p]>
SELECT url, COUNT(*) c FROM wiki GROUP BY url HAVING c>1;
-- 66 rows in set (0.04 sec)
```
This query should return 0 rows.