Currently it has 5 that will be generated as if it were unique, through the sub-report.
There are some reports that do not have current data. When I run only the report it is only shown the header (correctly) When I try to view it through the sub-report it is not shown, is there any way to only be shown the header when no data?
You would have to put the sub-report on the main report in such a way that it will be created even if there is no data in the main report. In other words, it can't be dependent on the dataset in the main report.