not saving to db after migration

i have a table groupChats, i have created migration file adding two columns like this

migration.up = function(db) {
db.db.execute('ALTER TABLE ' + db.table + ' ADD COLUMN groupID INTEGER;');
db.db.execute('ALTER TABLE ' + db.table + ' ADD COLUMN isNew INTEGER;');
};

var s = Alloy.createModel("groupChats", {
            groupName : gc.groupName,
            userID : Uid,
            groupBy : gb,
            createdOn : new Date(),
            ischatting : 0,
            isNew : isNew2,
            groupID : groupID2
        });
s.save();