diff -u b/core/modules/migrate/src/Plugin/MigrateSourceInterface.php b/core/modules/migrate/src/Plugin/MigrateSourceInterface.php
--- b/core/modules/migrate/src/Plugin/MigrateSourceInterface.php
+++ b/core/modules/migrate/src/Plugin/MigrateSourceInterface.php
@@ -119,7 +119,7 @@
    * @return string|null
    *   The source module or NULL if not found.
    *
-   * @deprecated in drupal:9.4.0 and is removed from drupal:10.0.0.
+   * @deprecated in drupal:10.0.0 and is removed from drupal:10.0.0.
    *   Instead, you should use
    *   Drupal\migrate_drupal\Plugin\DrupalSourceInterface::getSourceModule().
    * @see https://www.drupal.org/node/3306373