ObjectFieldNameException$MustNotBeDuplicate thrown when attempting to edit the ERC of a custom field

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: Master
• Fix Version/s: 7.4.13 DXP U52, 7.4.3.52 CE GA52, Master
• Component/s: Objects
• Labels:
  • 7.4-blocker
  • 7.4.13-u52
• Fix Priority: 4
• Git Pull Request: https://github.com/liferay-objects/liferay-portal/pull/1393
• Bug Type: Regression Bug

Steps:

1. Add the following to your portal-ext.properties before starting portal:
   1. feature.flag.LPS-135430=true
   2. feature.flag.LPS-162086=true
2. Navigate to Global Menu > Control Panel > Configuration > System Settings > Platform > Third Party > Site Scope > Salesforce Integration
3. Fill out the fields and click Save
   1. Contact the BPM team for credentials
4. Navigate to Global Menu > Control Panel > Object > Objects
5. Create an Object titled "My Object" with the storage type set to "Salesforce"
6. Go to "My Object" and create a new custom text field
7. Click on text field
8. Change the External Reference Code to "asdf"
9. Click Save

Expected result:
Expected the ERC to be updated to "asdf"

Actual result:
Error message seen on the screen: "This name is already in use. Try another one."

The following is thrown in the console:

WARN  [http-nio-8080-exec-1][BaseExceptionMapper:81] Problem {detail=null, status=Bad Request, title=Duplicate name a, type=ObjectFieldNameException.MustNotBeDuplicate}
com.liferay.object.exception.ObjectFieldNameException$MustNotBeDuplicate: Duplicate name a
	at com.liferay.object.service.impl.ObjectFieldLocalServiceImpl._validateName(ObjectFieldLocalServiceImpl.java:1093) ~[?:?]
	at com.liferay.object.service.impl.ObjectFieldLocalServiceImpl._addObjectField(ObjectFieldLocalServiceImpl.java:679) ~[?:?]
	at com.liferay.object.service.impl.ObjectFieldLocalServiceImpl.addCustomObjectField(ObjectFieldLocalServiceImpl.java:127) ~[?:?]