Thank you so much Aparajit.
I can propose this solution to the user.I have found the reason for hash symbol.It is because ,CY-1 cube and CY cube are not identical.That is,this Nav att is not enabled as Identification in MP definition for CY-1 cube whereas it is enabled in CY cube,even though MD is maintained properly.
Recently,we have moved the 2015 data to CY-1 cube and now the issue pops up to the user during reporting.
I'm going to propose your workaround till the MP definition is modified and transported.
Regards
Pradeep