Code review comments.

db/migrations/mysql/000101_create_true_up_review_history.up.sql

@@ -1,5 +1,5 @@
 CREATE TABLE IF NOT EXISTS TrueUpReviewHistory (
 	DueDate bigint(20),
 	Completed boolean,
-    PRIMARY KEY (duedate)
+    PRIMARY KEY (DueDate)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;