The repository corresponding to a few differentials on our install no longer exists (it was reimported). As a result, the repository field in the differential appears as "Unknown Object".
The bigger issue, however, is that users are not able to view these differentials (with the exception of the author). Instead, a "You Shall Not Pass: Differential Revision Unknown Object" dialog is shown.
How can I do a bulk update on all differentials to change the old PHID into the new PHID? I tried modifying the differential_diff.repositoryPHID` field directly, but this did not seem to worl