     load_file TEXT NOT NULL
     ) ENGINE=InnoDB;
 CREATE TABLE IF NOT EXISTS EdxTrackEvent (
-    _id VARCHAR(40) NOT NULL PRIMARY KEY,
+    _id VARCHAR(40) NOT NULL,
     event_id VARCHAR(40) NOT NULL,
     agent TEXT NOT NULL,
     event_source VARCHAR(255) NOT NULL,

    correctMap_fk VARCHAR(40) NOT NULL,
    answer_fk VARCHAR(40) NOT NULL,
    state_fk VARCHAR(40) NOT NULL,
    load_info_fk VARCHAR(40) NOT NULL
    ) 
PARTITION BY LIST COLUMNS(quarter) (
    PARTITION pAY2012_Spring VALUES IN ('spring2013'),
    PARTITION pAY2012_Summer VALUES IN ('spring2013'),

    PARTITION pAY2013_Fall VALUES IN ('fall2013'),
    PARTITION pAY2013_Winter VALUES IN ('winter2014'),

    PARTITION pAY2017_Winter VALUES IN ('winter2018'),
    PARTITION pAY2017_Spring VALUES IN ('spring2018'),
    PARTITION pAY2017_Summer VALUES IN ('summer2018')
);

CREATE TABLE IF NOT EXISTS ActivityGrade (
    activity_grade_id      int(11) 	 NOT NULL PRIMARY KEY,
