The logical file name "Archive_Log" is already in use but is clearly not in use

Hi

I once had such a logical filename but it was deleted. Now that i have rebuilt the DBs and i want to use this name, it says in use but there is no evidence of this:

Error: The logical file name "Archive_Log" is already in use. Choose a different name. (.Net SqlClient Data Provider)

Checks:
SELECT DB_NAME(database_id) AS DatabaseName, 
       name AS LogicalFileName, 
       physical_name AS PhysicalFileName 
FROM sys.master_files AS mf
ORDER by name

ArchiveArchive_DataD:\SQLData\Archive_Data.mdf
ArchiveArchive_IndexD:\SQLData\Archive_Index.ndf
ArchiveArchive_log_PrimaryD:\SQLLogs\Archive_Log.ldf

There is no Archive_Log so why can't I rename Archive_log_Primary to it?

Thanks

Mike