Calendar event gets duplicated after import ics file

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.0.X, 7.1.X, Master
• Fix Version/s: 7.0.0 DXP FP87, 7.0.10.12 DXP SP12, 7.0.X, 7.1.10 DXP FP13, 7.1.X, 7.2.10 DXP FP1, 7.2.1 CE GA2, 7.2.X, 7.3.10 DXP GA1, Master
• Component/s: Calendar
• Labels:
  • ee-ts
  • fw_code_review
  • liferay-dxp-70-sp12
  • liferay-fixpack-de-87-7010
  • liferay-fixpack-dxp-1-7210
  • liferay-fixpack-dxp-13-7110
• Branch Version/s:
  7.2.x, 7.1.x, 7.0.x
• Backported to Branch:
  Committed
• Fix Priority: 3
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/74304

Steps to reproduce:

1. Create a event from 6am to 7am
2. Edit the event to repeat daily for five days
3. Edit the event on the third day (eg. changing the description) and save as "Single Event"
4. Go to "Manage calendars" and export the calendar that contains those events
5. Import the generated ics file into some calendar app or some other calendar on the portal

Expected Results:
The event edited appears only once.

Actual Results:
On the date of the edited event, there are two events.