gistfile1.txt

mysql:[email protected] [staging]> CREATE UNIQUE INDEX wiki_rev_id ON events_sandbox_edit (wiki, rev_id);
ERROR 1062 (23000): Duplicate entry 'enwiki-625851283' for key 'wiki_rev_id'

mysql:[email protected] [staging]> select * from events_sandbox_edit where wiki = "enwiki" and rev_id = 625851283;
+--------+-----------+----------------+----------+---------------+----------------+------------------+
| wiki   | rev_id    | rev_timestamp  | rev_user | rev_user_text | page_namespace | page_title       |
+--------+-----------+----------------+----------+---------------+----------------+------------------+
| enwiki | 625851283 | 20140916191849 | 22216559 | Olive875      |              2 | Olive875/sandbox |
+--------+-----------+----------------+----------+---------------+----------------+------------------+
1 row in set (1.36 sec)