=== Error ===
`MediaWiki version:` **`1.35.0-wmf.8`**
```name=message
PHP Notice: Undefined index: key
```
=== Notes ===
A large spike of these and similar for indices `key` and `number` (in `Cite.php`) and `key`, `count`, and `text` in `ReferenceStack.php`, after deployment of 1.35.0-wmf.8.
Also some for values that appear to be coming from the query. From `logspam-watch`:
```
2 ErrorException (/srv/mediawiki/php-1.35.0-wmf.8/extensions/Cite/src/ReferenceStack.php:185) PHP Notice: Undefined index: itis
2 ErrorException (/srv/mediawiki/php-1.35.0-wmf.8/extensions/Cite/src/ReferenceStack.php:185) PHP Notice: Undefined index: brr
1 ErrorException (/srv/mediawiki/php-1.35.0-wmf.8/extensions/Cite/src/ReferenceStack.php:185) PHP Notice: Undefined index: RIAA
1 ErrorException (/srv/mediawiki/php-1.35.0-wmf.8/extensions/Cite/src/ReferenceStack.php:185) PHP Notice: Undefined index: Marantz-31-10-16
1 ErrorException (/srv/mediawiki/php-1.35.0-wmf.8/extensions/Cite/src/ReferenceStack.php:185) PHP Notice: Undefined index: belgian
```