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• PDOException: SQLSTATE[40001]: Serialization failure: 1213 Deadlock found when trying to get lock; try restarting transaction: DELETE FROM {cache_bootstrap} WHERE (cid = :db_condition_placeholder_0) ; Array ( [:db_condition_placeholder_0] => variables ) in cache_clear_all() (Zeile 173 von /var/www/vhosts/mechant-loup.schule.de/httpdocs/engagement/includes/cache.inc).