10 statements processed. ERROR: Can not insert configuration_key "", it already existsNote: 1 statements ignored. See "upgrade_exceptions" table for additional details.

..it doesnt work to me....I have cross sell and advanced too. What I did wrong. It happend when I insert your sql script

SET @t4=0;
SELECT (@t4:=configuration_group_id) as t4
FROM configuration_group
WHERE configuration_group_title= 'Cross Sell';
DELETE FROM configuration WHERE configuration_group_id = @t4;
DELETE FROM configuration_group WHERE configuration_group_id = @t4;

INSERT INTO configuration_group VALUES ('', 'Cross Sell', 'Set Cross Sell Options', '1', '1');
UPDATE configuration_group SET sort_order = last_insert_id() WHERE configuration_group_id = last_insert_id();

SET @t4=0;
SELECT (@t4:=configuration_group_id) as t4
FROM configuration_group
WHERE configuration_group_title= 'Cross Sell';


UPDATE configuration SET configuration_group_id = @t4 WHERE configuration_key IN ('MIN_DISPLAY_XSELL','MAX_DISPLAY_XSELL','SHOW_PRODUCT_INFO_COLUMNS_XSELL_PRODUC TS','XSELL_DISPLAY_PRICE');

INSERT INTO configuration (configuration_id, configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, last_modified, date_added, use_function, set_function) VALUES
('', 'Input type to be used in form', 'XSELL_FORM_INPUT_TYPE', 'model', 'Choose to use product ID or MODEL as your input type. Check readme file for more info', @t4, 1, NOW(), NOW(), NULL, 'zen_cfg_select_option(array(''id'', ''model''),');