An error is thrown when enable staging on My Dashboard.

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.0.X, 7.1.X, 7.2.X, Master
• Fix Version/s: 7.0.0 DXP FP85, 7.0.10.12 DXP SP12, 7.0.X, 7.1.10 DXP FP13, 7.1.X, 7.2.10 DXP FP1, 7.2.1 CE GA2, 7.2.X, 7.3.10 DXP GA1, Master
• Component/s: Content Publishing > Staging
• Labels:
  • ee-ts
  • liferay-dxp-70-sp12
  • liferay-fixpack-de-85-7010
  • liferay-fixpack-dxp-1-7210
  • liferay-fixpack-dxp-13-7110
• Branch Version/s:
  7.2.x, 7.1.x, 7.0.x
• Backported to Branch:
  Committed
• Fix Priority: 3
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/76330

Description
An error is thrown when enable staging on My Dashboard.

 Steps to reproduce

1. Setup liferay 7.0
2. Login as default user
3. Navigate to My Dashboard > Publishing > Staging
4. Enable Local Live staging

Actual result
The following is thrown and an error message is displayed.

Error: An unexpected error occurred with the initial staging publication. org.springframework.dao.DataIntegrityViolationException: Could not execute JDBC batch update; SQL [insert into Group_ (mvccVersion, uuid_, companyId, creatorUserId, classNameId, classPK, parentGroupId, liveGroupId, treePath, groupKey, name, description, type_, typeSettings, manualMembership, membershipRestriction, friendlyURL, site, remoteStagingGroupCount, inheritContent, active_, groupId) values (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)]; constraint [null]; nested exception is org.hibernate.exception.ConstraintViolationException: Could not execute JDBC batch update

2019-07-04 02:36:18.038 ERROR [http-nio-8080-exec-3][JDBCExceptionReporter:234] Duplicate entry '20115-20087-20155' for key 'IX_D0D5E397'

Expected result
Staging feature should not be enabled on My Dashboard.

Reproduced in
7.0.x Commit: f32bb75b0f08e42417997d62c799861a4d5cc214
Master Commit: 79f9d28848bb635cb4effee85618164314c283a5

Not Reproducible in 6.2 as Staging menu is not available for My Dashboard.