Kepler

My current auth namespace is 3371. I have a file with an old auth namespace of 1347. If I open the XML file, view LSID, and roll revision, then generate a report and attempt to save the KAR, I get an error saying it can't be saved because the report is NULL. If I open the XML file, view LSID, new object ID, then generate a report, I can save the KAR as expected. If I open the XML file, delete an actor then undo, then generate a report, I can save the KAR as expected.

Thing seem to work fine if the auth namespace is the same.

What's the difference between roll revision and new object ID, why do we need 2, and why doesn't roll revision seem to work in this case.