All existing web contents based on custom structure are broken after upgrade

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: Master
• Fix Version/s: Master
• Component/s: Data Engine
• Labels:
  • QA-AUTOMATION
  • echo-board-in
  • migration_to_dataengine
  • pt-upgrade-review
• Epic/Theme:
  • Old_Form_Builder_Renderer_Replacement
• Fix Priority: 5
• Git Pull Request: https://github.com/liferay-echo/liferay-portal/pull/3287
• QA Test Name:
  • LocalFile.PageEditorUpgrade#ConfigurePageEditorAfterUpgrade721
  • LocalFile.PageEditorUpgrade#ConfigurePageEditorAfterUpgrade72101
  • LocalFile.WebContentAutoTaggingUpgrade#ViewWebContentArchive72101
  • LocalFile.WebContentUpgrade#ViewWebContentWithAllFieldsArchive621021
  • LocalFile.WebContentUpgrade#ViewWebContentWithImageArchive70106
  • LocalFile.WebContentUpgrade#ViewWebContentWithImageArchive704
  • LocalFile.WebContentUpgrade#ViewWebContentWithPredefinedValueInWebContentFieldArchive701014
  • LocalFile.WebContentUpgrade#ViewWebContentWithPredefinedValueInWebContentFieldArchive71103
  • LocalFile.WebContentUpgrade#ViewWebContentWithPredefinedValueInWebContentFieldArchive713
  • LocalFile.WebContentUpgrade#ViewWebContentWithPredefinedValueInWebContentFieldArchive721
  • LocalFile.WebContentUpgrade#ViewWebContentWithPredefinedValueInWebContentFieldArchive72101
  • LocalFile.WebContentUpgrade#ViewWebContentWithPredefinedValueInWebContentFieldArchive730
  • LocalFile.WebContentWithCustomStructures#AddWCWithFirstComplexStructure
  • LocalFile.WebContentWithCustomStructures#AddWCWithSecondComplexStructure
• QA Test Score: 55

Step to reproduce:

1. Start a 6.2 or 7.0 or 7.1 or 7.2 or 7.3
2. Add a web content structure with all fields
3. Add a web content based on new structure
4. Type title and all fields
5. Publish
6. Shutdown server
7. Copy data to master folder
8. Upgrade to master
9. Start master
10. Execute reindex
11. Navigate to web content in edit mode

Expected Results:
All fields and values should be shown.

Actual Results:
The web content is broken. Additionally, access to new structure in edit mode, all fields are lost.

Reproduced on:
Upgrade From:6.2-EE-SP20.
Tomcat 9.0.37 + MySQL 5.7. Portal master GIT ID: 0704aa6bd8088470d232d051bfda427506516359.