Upgrading to 3.119 Fails if Org has pre-existing Unmanaged Custom Tabs on Volunteer Shift / Hours

[coriobriensfdo]

Issue:

Due to Issue #495 , version 3.119 released a managed tab on the Volunteer Shift and Hours objects.

However, if a customer Org has already created their own unmanaged versions of these two object tabs, an error is thrown during upgrade:

Unmanaged custom object tab already exists, package upgrade cannot create another tab
OR
_Cannot add component of type:CustomTab named:Volunteer_Hours__c subjectId:01r5w000001Bt3t to another package because it is an installed component._

Steps to Repeat:

1. In an org with V4S version 3.118 create a tab for Volunteer Shift and Hours objects.
2. Using MetaDeploy, attempt to install version 3.119.
   Expected Result: Org updates to 3.119
   Actual Result: Org update fails with above message(s)

Workaround:
Delete custom unmanaged object tabs, and reattempt installation.

Further details found on W-8068273

[salesforce-org-metaci]

Included in beta release 3.120 (Beta 2)

[salesforce-org-metaci]

Included in production release 3.120