Difference between Request Metric and Request Metric (Current snapshot) in RRDI Query Studio?

I wonder if anyone can help...When I select a query such as Planned or Actual work in Request Metric of RRDI Query Studio I see the following error:

RQP-DEF-0177
An error occurred while performing operation 'sqlScrollBulkFetch' status='-232'.
UDA-SQL-0144 An arithmetic exception was detected.[IBM][CLI Driver][DB2/AIX64] SQL0802N Arithmetic overflow or other arithmetic exception occurred. SQLSTATE=22003 UDA-CUR-0000 Unable to fetch the row.RSV-SRV-0042 Trace back:RSReportService.cpp(722): QFException: CCL_CAUGHT: RSReportService::process()RSReportServiceMethod.cpp(263): QFException: CCL_RETHROW: RSReportServiceMethod::process(): reportEditQuerySpecification_RequestRSASyncExecutionThread.cpp(808): QFException: RSASyncExecutionThread::checkExceptionRSASyncExecutionThread.cpp(260):

It works fine if I select the Request Metrics (Current sprint). Is there something wrong with the data stored in DW database?

Many thanks