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Server version: 5.5.5-10.0.33-MariaDB MariaDB Server
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(labsdbadmin@labsdb1005.eqiad.wmnet) [(none)]> DROP USER IF EXISTS 's53692'@'%';
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'IF EXISTS 's53692'@'%'' at line 1