WP 2.3.3 Error :: Duplicate Entry Assistance

Hello. If anyone can assist on this it would be appreciated. We’re not familiar with any techno DB beyond a simple install of WordPress. The site, as a result of this, along with the lack of additional knowledge, has brought the site down. After reading similar posts we don’t really have any idea as to what procedure to follow in order to rectify this. However, the DB was backed up prior to the upgrade. Thanks in advance.

A few days previously we followed the simple upgrade procedure to 2.3.3 from 2.2.3. Immediately errors were shown on the screen. An example of what is shown is below. At the current time nothing more than a simple banner/graphic and search field are shown on the site (imaginginsider.com). Example of what was shown in a browser during the upgrade process after being notified that the DB needed to be upgraded:

WordPress database error: [Duplicate entry ‘1’ for key 1]
INSERT INTO wp_terms (term_id, name, slug, term_group) VALUES (‘1’, ‘NewsStream’, ‘capturing-the-newsstream-2’, ‘1’)

WordPress database error: [Duplicate entry ‘1-category’ for key 2]
INSERT INTO wp_term_taxonomy (term_id, taxonomy, description, parent, count) VALUES (‘1’, ‘category’, ”, ‘0’, ‘28945’)

WordPress database error: [Duplicate entry ‘2’ for key 1]
INSERT INTO wp_terms (term_id, name, slug, term_group) VALUES (‘2’, ‘Press Releases’, ‘press-releases-2’, ‘1’)

WordPress database error: [Duplicate entry ‘2-category’ for key 2]
INSERT INTO wp_term_taxonomy (term_id, taxonomy, description, parent, count) VALUES (‘2’, ‘category’, ”, ‘0’, ‘6347’)

etc., etc., etc. …