 <p>This worked for me on a CentOS/Plesk server:</p> <p>mysql_upgrade -uadmin -p<code>&lt; /etc/psa/.psa.shadow</code> -f</p> <p>service mysqld restart</p> <p><a href="http://kb.sp.parallels.com/en/427" rel="nofollow">http://kb.sp.parallels.com/en/427</a></p>