Question : cannot drop statistics in sql server

I have a problem deleting one of the statistics in the table.
when i script
if  exists (select * from sys.stats where name = N'inx_add_1' and object_id = object_id(N'[dbo].[Call_Details_]'))
DROP STATISTICS [dbo].[Call_Details_].[inx_add_1]

then get an error below
Msg 3739, Level 11, State 1, Line 3
Cannot DROP the index 'dbo.Call_Details_.inx_add_1' because it is not a statistics collection.


any idea why is this happening, and when i  right click on the stats name the "script statistics as"  is grayed out by default. any idea friends....

Answer : cannot drop statistics in sql server

It appears that it's an index and not statistics
try drop index instead