Hi Liang,
Please find below steps to change the capacity category.
1. Uncheck the capacity requirement indicator in all open orders
2. when u try to delete, it will say "Capacity is still being used"
3. Table KBED, use capacity ID and run, it will list out the pending orders
4. When the table has no entries, delete the capacity category
5. check all capacity indicator
Regards
Terence
