Can't add multiple properties to a category.

• Type: Regression Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 6.1.1 CE GA2, 6.1.20 EE GA2
• Fix Version/s: 6.1.30 EE GA3, 6.2.0 CE M2
• Component/s: Categories
• Labels:
  • QA-R
• Environment: Tomcat 7.0 + MySQL 5. Portal 6.2.x GIT ID: 3cd9429080a2f47e9d05830dbe6900cacdebec5c.
• Branch Version/s:
  6.1.x
• Backported to Branch:
  Committed
• Fix Priority: 4
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/7436

Steps to reproduce:

1. Go to Control Panel click Categories.
2. Add a new vocabulary named Vocabulary Name.
3. Add a new Category category1 in vocabulary Name, with a value in the Properties component.
4. Edit the new category, add another value in the Properties component, like the attach file.
5. Save.

Expectation:
Edit successfully.
Reality:
Fail to edit the category, and got an error message on console like the following

08:32:24,264 ERROR [http-bio-8080-exec-1][JDBCExceptionReporter:76] Duplicate entry '10438-Category Property1 Key' for key 'IX_DBD111AA'