Found "duplicate key value violates unique constraint "category_title"" in my logs while doing importDump and seeing that it is defined in tables.sql as

CREATE UNIQUE INDEX category_title ON category(cat_title);

I thought there might be something wrong with the dump, but grepping for the title ("Articles_with_example_pseudocode") only found the following in my logs:

LOG: statement: INSERT /* LinksUpdate::incrTableUpdate 127.0.0.1 */ INTO categorylinks (cl_from,cl_to,cl_sortkey,cl_timestamp,cl_sortkey_prefix,cl_collation,cl_type) VALUES ('439','Articles_with_example_pseudocode','ALGORITHMS FOR CALCULATING VARIANCE
LOG: statement: SELECT /* LinksUpdate::invalidatePages 127.0.0.1 */ page_id FROM page WHERE page_namespace = '14' AND (page_title IN ('Statistical_algorithms','Statistical_deviation_and_dispersion','Articles_with_example_pseudocode')) AND (page_touched < '2011-02-09 18:07:14 GMT')
LOG: statement: INSERT /* Article::updateCategoryCounts 127.0.0.1 */ INTO category (cat_id,cat_title) VALUES ('1586','Articles_with_example_pseudocode')
STATEMENT: INSERT /* Article::updateCategoryCounts 127.0.0.1 */ INTO category (cat_id,cat_title) VALUES ('1586','Articles_with_example_pseudocode')
LOG: statement: UPDATE /* Article::updateCategoryCounts 127.0.0.1 */ category SET cat_pages = cat_pages + 1 WHERE cat_title IN ('Statistical_algorithms','Statistical_deviation_and_dispersion','Articles_with_example_pseudocode')

(The error occured on the "category" INSERT statement)

Version: 1.18.x
Severity: normal