[closed] Resuming suspended changesets in stream not working

My situation:  My project was originally in CVS.  The project and all of its history was transferred to Jazz Source Control about 2 years ago.  The team made changes to the code in Jazz Source Control.

What I'm trying to do:  Revert my repo workspace to the beginning of its history, so I can choose to pull in changes from the project's original history.

Steps I followed:

1. Create a new repository workspace
2. In the Pending Changes view, right click on the component and select Show > History
3. Select all of the history
4. Right click and select Suspend
5. Return to the Pending Changes view
6. Right click on the bottom-most (oldest) changeset and select Resume

Expected:  The changeset is incorporated into my repository workspace, and the changeset is no longer listed in the Suspended view.

Actual:  A dialog showing "Operation in progress" briefly appears and then nothing changes.  The changeset is still listed in the Suspended view.

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I've also tried to accept the changeset using the command line:

lscm resume changeset [myuuid]

The output is:

Resuming change sets:
Workspace unchanged.

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When I run lscm status, I can see the change sets that were created after the transition to RTC have aliases:

(1697) ----$ 'info about my changeset'

However, the changeset I'm trying to resume that was migrated from CVS does not have an alias:

(----) ----% 'info about my changeset'

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Instead of suspending the changes, I've also tried discarding the changesets, but as I describe in https://jazz.net/forum/questions/184986/how-can-i-revert-repository-workspace-back-in-time, the changesets that were migrated from CVS are not listed as Incoming changes.

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I'm unsure if this is a defect or I'm completely missing something.  Any advice on how to resume the changesets or get the changesets to display as Incoming after discarding would be appreciated.