Commerce Discount Module problem in Cart Total

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.0.7
• Fix Version/s: 2.1.0
• Component/s: Digital Merchandise Management → Discounts
• Labels: None
• Git Pull Request: https://github.com/marco-leo/liferay-portal-ee/pull/262
• Sprint: FlexSprint01

Environment info?
Liferay DXP 7.1 Fix-Pack 15 + Commerce Enterprise 2.0.7.lpkg

Steps to reproduce:

1. Control Panel -> Commerce -> Discounts
2. Click 'Add' button
3. Enter Title 'Total Discount'
4. For Target choose "Apply to Total"
5. Click Publish
6. Click. Rules tab
7. Click 'Add' button
8. For Type choose Cart Total
9. Click 'Submit'

Expected Behavior
The form shouldn't be submitted

Actual Behavior
The form is submitted. If the rule is re-opened, an error is thrown.