PortletPreferences related to stage group doesn't deleted when staging is turned off

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 6.1.1 CE GA2, 6.1.20 EE GA2
• Fix Version/s: 6.0.X EE, 6.1.30 EE GA3, 6.2.0 CE M6
• Component/s: Content Publishing > Staging
• Labels:
  • 6.0_release_notes
  • ee-ts
• Branch Version/s:
  6.1.x, 6.0.x
• Backported to Branch:
  Committed
• Story Points: 4
• Fix Priority: 3
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/11344

When staging is turned on, several new records are inserted into the portletpreferences table.

When staging is turned off, most of the inserted records related to the stage group are deleted except the one where the ownerId is the staged group's id.