ERROR while trying to upgrade MySQL password format for Billing user.

Upgrade failed with below error:

ERROR 1133 (42000) at line 1: Can't find any matching row in the user table
ERROR 1133 (42000) at line 1: Can't find any matching row in the user table

ERROR while trying to upgrade MySQL password format for Billing user
Check the error reason(see log file: /tmp/plesk_11.0.9_installation.log), fix and try again

Such error occurs if the password for "billing" user is missing in the psa database. To fix it,

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#insert into `user` (Host,User,Password) values ('localhost', 'billing', 'password');

#echo 'SET PASSWORD FOR "billing"@"localhost" = PASSWORD("password")'|mysql -uadmin -p`cat /etc/psa/.psa.shadow`

#echo 'GRANT ALL PRIVILEGES ON `billing`.* TO "billing"@"localhost";' | mysql -uadmin -p`cat /etc/psa/.psa.shadow`

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