Error message when trying to run upgrade 1.3.7 to 1.3.8

getting the following error when I choose upgrade cfg files, maybe some kind soul can interpret:

1062 Duplicate entry 'Customers who have never completed a purchase' for key 2
in:
[INSERT INTO query_builder (query_category, query_name, query_description , query_string) VALUES ('email,newsletters', 'Customers who have never completed a purchase', 'For sending newsletter to all customers who registered but have never completed a purchase', 'SELECT DISTINCT c.customers_email_address as customers_email_address, c.customers_lastname as customers_lastname, c.customers_firstname as customers_firstname FROM TABLE_CUSTOMERS c LEFT JOIN TABLE_ORDERS o ON c.customers_id=o.customers_id WHERE o.date_purchased IS NULL');]

The database files seem to be upgraded - version ifno is as follows:

Zen Cart 1.3.7

Database Patch Level: 1.3.8

TIA

That means you've run the upgrade process once already and now you're getting errors when you run it the second time.

The fastest way around the problem is to locate that particular statement in the /zc_install/sql/mysql_upgrade_137_to_138.sql file, and put a # in front of it, and run the 137-to-138 upgrade step again from your browser.

OK done that now I'm stuck with the following errors:
and the version remains at 13.7 / 1.3.8
:dontgetit

SKIPPED: Cannot insert configuration_key "SHOW_SHOPPING_CART_COMBINED" because it already exists
SKIPPED: Cannot insert configuration_key "ORDER_COMMENTS_INVOICE" because it already exists
SKIPPED: Cannot insert configuration_key "ORDER_COMMENTS_PACKING_SLIP" because it already exists
SKIPPED: Cannot ADD column module_name because it already exists.
SKIPPED: Cannot ADD column module_mode because it already exists.
SKIPPED: Cannot ADD column module_name because it already exists.
SKIPPED: Cannot ADD column module_mode because it already exists.
SKIPPED: Cannot create table nochex_apc_transactions because it already exists
SKIPPED: Cannot create table nochex_sessions because it already exists
SKIPPED: Cannot create table nochex_sessions because it already exists
SKIPPED: Cannot create table nochex_sessions because it already exists
SKIPPED: Cannot create table nochex_sessions because it already exists
SKIPPED: Cannot CHANGE column zen_order_id because it does not exist.
SKIPPED: Cannot CHANGE column zen_order_id because it does not exist.
SKIPPED: Cannot ALTER or INSERT/REPLACE into table linkpoint_api because it does not exist. CHECK PREFIXES!

Those informational messages are all very expected.

What version information is showing in your admin area, under Tools->Server Info?

Its says

Zen Cart 1.3.7

Database Patch Level: 1.3.8

v1.3.8 [2008-04-05 18:21:48] (Version Update 1.3.7->1.3.8)
v1.3.7 [2007-06-09 21:39:54] (Fresh Installation)

That means you've upgraded your database, but haven't upgraded your site's PHP files yet.