I’ve seen this in several failed builds now, [example](https://integration.wikimedia.org/ci/job/wikibase-repo-docker/8791/console) ([change](https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Wikibase/+/551609/1)):
```
19:49:48 There was 1 error:
19:49:48
19:49:48 1) Wikibase\Repo\Tests\Store\Sql\LockManagerSqlChangeDispatchCoordinatorTest::testBasicLockManager
19:49:48 === Logs generated by test case
19:49:48 [objectcache] [debug] MainWANObjectCache using store {class} {"class":"EmptyBagOStuff"}
19:49:48 ===
19:49:48 ERROR: 0 is not in the dispatch table. [Called from Wikibase\Repo\Store\Sql\SqlChangeDispatchCoordinator::warn in /workspace/src/extensions/Wikibase/repo/includes/Store/Sql/SqlChangeDispatchCoordinator.php at line 608]
19:49:48
19:49:48 /workspace/src/includes/debug/MWDebug.php:333
19:49:48 /workspace/src/includes/debug/MWDebug.php:188
19:49:48 /workspace/src/includes/GlobalFunctions.php:1079
19:49:48 /workspace/src/extensions/Wikibase/repo/includes/Store/Sql/SqlChangeDispatchCoordinator.php:608
19:49:48 /workspace/src/extensions/Wikibase/repo/includes/Store/Sql/SqlChangeDispatchCoordinator.php:459
19:49:48 /workspace/src/extensions/Wikibase/repo/includes/Store/Sql/SqlChangeDispatchCoordinator.php:284
19:49:48 /workspace/src/extensions/Wikibase/repo/tests/phpunit/includes/Store/Sql/LockManagerSqlChangeDispatchCoordinatorTest.php:65
19:49:48 /workspace/src/tests/phpunit/MediaWikiIntegrationTestCase.php:426
19:49:48 /workspace/src/maintenance/doMaintenance.php:99
```
Affected repositories:
- mediawiki/extensions/Wikibase
- [change 551537](https://gerrit.wikimedia.org/r/551537) ([build](https://integration.wikimedia.org/ci/job/wikibase-repo-docker/8790/console))
- [change 551609](https://gerrit.wikimedia.org/r/551609) ([build](https://integration.wikimedia.org/ci/job/wikibase-repo-docker/8791/console))
- [change 551613](https://gerrit.wikimedia.org/r/551613) ([build](https://integration.wikimedia.org/ci/job/wikibase-repo-docker/8793/console))
It affects both regular test builds and gate-and-submit builds, but only the `wikibase-repo-docker` job.