Could not delete portal instance when adding an child site for organization site

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.0.X, Master
• Fix Version/s: 7.1.10 DXP FP1, 7.1.1 CE GA2, 7.1.10.1 SP1, 7.1.X, Master
• Component/s: Portal Configuration > Portal Instances, User Management > Users & Organizations
• Labels:
  • liferay-beta-ce-710
  • liferay-dxp-71-sp1
  • liferay-fixpack-dxp-1-7110
• Branch Version/s:
  7.1.x
• Backported to Branch:
  Committed
• Story Points: 0.25
• Fix Priority: 3
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/61559

Steps to reproduce:

1. Add a virtual instance, for example, test.com
2. Go to http://test.com:8080 and login
3. Add an organization, for example, organization site
4. Check the check box Create Site to create a site for organization site
5. Add a blank site, choose organization site as parent site
6. Go back to http://localhost:8080
7. Delete the virtual instance

Actual result:
Unable to delete the virtual instance.

Expected result:
Able to delete the virtual instance.