Metadata for custom document type is duplicated when exporting/importing from a lar

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 6.2.10 EE GA1, 7.0.0 M3
• Fix Version/s: 6.2.2 CE GA3 , 6.2.X EE, 7.0.0 M1
• Component/s: Staging, Staging > Export/Import
• Labels:
  • ee-ts
  • liferay-fixpack-document-management-12-6210
• Branch Version/s:
  6.2.x
• Backported to Branch:
  Committed
• Story Points: 6
• Fix Priority: 3
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/20267

Steps to reproduce:
1) Create a custom document type with a date and text field
2) Add two documents of the custom type with unique values for the date and text fields
3) Export the docs and media to a LAR
4) Create a new site
5) Import the LAR to docs and media in the new site

Expected results:
Each document would have its original unique metadata.

Actual results:
Each document has identical metadata in the new site.