Report based on an existing metric Detail => No data is currently available

Hello,

 I would like to create a report showing the % of free Recovery Area. A default metrics is already configured to throw its data every 15 minutes on the OMR. I can see those datas by this query

select *

from mgmt$metric_current m mgmt$metric_current m where m.target_name like '%tladbx90%' like '%tladbx90%' and m.target_type='oracle_database' m.target_type='oracle_database' and metric_name='Recovery_Area' metric_name='Recovery_Area'

I do not understand why, when i create a new report based on a "metric Details" with the metric named : "Archive Area Used", on the target "tladbx90", then the report does not show any data : "No data is currently available".