Note: This is very similar to T314779. But seems like this issue is different. (reverse issue?)
**Steps to replicate the issue** (include links if applicable):
So this was testing the update from some-what-backed-up-on-years-ago mediawiki 1.35 instance to mediawiki 1.39-rc.1. Sorry that i don't know what causes it.
* Run `update.php` on MW 1.39-rc.1 with Echo REL1_39 branch from Mediawiki 1.35 Instance DB.
**What happens?**:
```
Wikimedia\Rdbms\DBQueryError from line 1618 of /srv/wiki/w/includes/libs/rdbms/database/Database.php: Error 1091: Can't DROP FOREIGN KEY `echo_push_subscription_ibfk_2`; check that it exists
Function: Wikimedia\Rdbms\Database::sourceFile( /srv/wiki/w/extensions/Echo/sql/mysql/patch-cleanup-push_subscription-foreign-keys-indexes.sql )
Query: ALTER TABLE `echo_push_subscription` DROP FOREIGN KEY `echo_push_subscription_ibfk_2`
#0 /srv/wiki/w/includes/libs/rdbms/database/Database.php(1602): Wikimedia\Rdbms\Database->getQueryException()
#1 /srv/wiki/w/includes/libs/rdbms/database/Database.php(1576): Wikimedia\Rdbms\Database->getQueryExceptionAndLog()
#2 /srv/wiki/w/includes/libs/rdbms/database/Database.php(952): Wikimedia\Rdbms\Database->reportQueryError()
#3 /srv/wiki/w/includes/libs/rdbms/database/Database.php(3299): Wikimedia\Rdbms\Database->query()
#4 /srv/wiki/w/includes/libs/rdbms/database/Database.php(3238): Wikimedia\Rdbms\Database->sourceStream()
#5 /srv/wiki/w/includes/libs/rdbms/database/DBConnRef.php(103): Wikimedia\Rdbms\Database->sourceFile()
#6 /srv/wiki/w/includes/libs/rdbms/database/DBConnRef.php(806): Wikimedia\Rdbms\DBConnRef->__call()
#7 /srv/wiki/w/includes/installer/DatabaseUpdater.php(718): Wikimedia\Rdbms\DBConnRef->sourceFile()
#8 /srv/wiki/w/includes/installer/DatabaseUpdater.php(819): DatabaseUpdater->applyPatch()
#9 /srv/wiki/w/includes/installer/DatabaseUpdater.php(547): DatabaseUpdater->addIndex()
#10 /srv/wiki/w/includes/installer/DatabaseUpdater.php(515): DatabaseUpdater->runUpdates()
#11 /srv/wiki/w/maintenance/update.php(202): DatabaseUpdater->doUpdates()
#12 /srv/wiki/w/maintenance/includes/MaintenanceRunner.php(309): UpdateMediaWiki->execute()
#13 /srv/wiki/w/maintenance/doMaintenance.php(85): MediaWiki\Maintenance\MaintenanceRunner->run()
#14 /srv/wiki/w/maintenance/update.php(312): require_once('...')
#15 {main}
```
**What should have happened instead?**:
Run smoothly.
**Software version** (skip for WMF-hosted wikis like Wikipedia):
```
Mediawiki 1.39-rc.1
MariaDB 10.9.3
PHP 8.0.25 (Alpine v3.16)
```
**Other information** (browser name/version, screenshots, etc.):