SET data type not translating

I reverse engineered from my mysql db and then added relationships and then forward engineered a sql script from SchemaBank. Somewhere along the way the items in my SET data types got lost.

The exported sql file showed:
CREATE TABLE `mydb`.`Band_Membership` (
`Band_Membership_ID` BIGINT(20) NOT NULL,
`Role` SET() CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL, ...

when it should have showed:
CREATE TABLE `mydb`.`Band_Membership` (
`Band_Membership_ID` BIGINT(20) NOT NULL,
`Role` SET(`Musician`,`Administrator`) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,...