When I run the SQL file to install this mod, I get this error:

1062 Duplicate entry 'STOCK_SHOW_LOW_IN_CART' for key 2
in:
[INSERT INTO zen_configuration (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, last_modified, date_added, use_function, set_function) VALUES ('Show available stock level in cart when less than order', 'STOCK_SHOW_LOW_IN_CART', 'false', 'When customer places more items in cart than are available, show the available amount on the shopping cart page:', '9', '6', NULL, now(), NULL, "zen_cfg_select_option(array('true', 'false')," );]
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...not exactly sure what's causing this, or what I can do to fix it. Any help would be appreciated!