`grade_id` BIGINT(20) UNSIGNED NOT NULL DEFAULT 0,
`grade_cash_id` BIGINT(20) UNSIGNED NOT NULL DEFAULT 0,
PRIMARY KEY (`id`),
-UNIQUE `grade_cash` (`grade_id`,`grade_cash_id`),
+UNIQUE INDEX `grade_cash` (`grade_id`,`grade_cash_id`),
INDEX (`grade_cash_id`)",
'Grade<->cash data connection');