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Error message

PDOException: SQLSTATE[40001]: Serialization failure: 1213 Deadlock found when trying to get lock; try restarting transaction: DELETE FROM {semaphore} WHERE (name = :db_condition_placeholder_0) AND (value = :db_condition_placeholder_1) ; Array ( [:db_condition_placeholder_0] => variable_init [:db_condition_placeholder_1] => 691848118660534c2b1ae47.42318600 ) in lock_release() (line 254 of /dhamma/web/apps/commerce_kickstart-7.x-2.54/includes/lock.inc).