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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] => 4409334335c3f07b4652033.13621837
)
in lock_release() (line 254 of /var/www/prod/docroot/includes/lock.inc).