Most likely, this is because a field which is required in the report was not imported with your tickets. For example the user and agent of the ticket. It's hard to give a precise answer without taking a look at what data was imported.
Most likely, this is because a field which is required in the report was not imported with your tickets. For example the user and agent of the ticket. It's hard to give a precise answer without taking a look at what data was imported.