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Drupal\Core\Entity\EntityStorageException: SQLSTATE[40001]: Serialization failure: 1213 Deadlock found when trying to get lock; try restarting transaction: DELETE FROM {cache_entity} WHERE cid IN (:db_condition_placeholder_0); Array ( [:db_condition_placeholder_0] => values:broken_link:21 ) in Drupal\Core\Entity\Sql\SqlContentEntityStorage->save() (line 846 of core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorage.php).