[CMT8.4.1.1209] Cannot migrate some sql statement with different columns to one table

1 Migrate the two sql statement to one table.
SELECT count as coun FROM "db_index" where class_name not in (select class_name from db_class where is_system_class ='YES') and is_primary_key ='NO';

SELECT count as cc FROM "db_index" where class_name not in (select class_name from db_class where is_system_class ='YES') and is_primary_key ='YES';

Actual result:
It will pop warning. As migrate two table which has different column, it will create two column in new table. But there isn't . Please consider it.