The user tries to create a custom item field in the discount item type. But there are the following scenarios
- The Discount option is not available in the Apply to item types
- Discount item custom forms are not available in the Apply to form options
- Even if the custom field is created from the Discount Item custom form, not able to apply the item to the discount item type.
Currently, the ability to create custom fields in discount items is an enhancement (ID- 83136).
