I'm getting the following error message while upgrading from 2.0.4 to 2.2.4.

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An error occured:

DBD::mysql::st execute failed: Duplicate column name 'users_join_ip' at /home/domain.com/web/mailadmin/GT/SQL/Driver/sth.pm line 101.
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It shows the above error and stops. When I login to the admin interface, the version is shown to be 2.2.4.


Also, the users with encrypted password (registered through the forum) can't login to the webmail.
Only the users created through the admin interface can login to the webmail.

Regards,
Vishnu