indexes with no name

Using SQL 2008 R2.

I am running the following query to find fragmented indexes for rebuild and update statistics. It returns some records with null index name. What should I do with those? Do they need to be rebuilt for performance? How?

SELECT top 50
dbschemas.[name] as 'SchemaName',
dbtables.[name] as 'TableName',
dbindexes.[name] as 'IndexName',
indexstats.avg_fragmentation_percent,
indexstats.page_count,
getdate() AS loaddate
INTO #temp
FROM sys.dm_db_index_physical_stats (DB_ID(), NULL, NULL, NULL, NULL) AS indexstats
INNER JOIN sys.tables dbtables on dbtables.[object_id] = indexstats.[object_id]
INNER JOIN sys.schemas dbschemas on dbtables.[schema_id] = dbschemas.[schema_id]
INNER JOIN sys.indexes AS dbindexes ON dbindexes.[object_id] = indexstats.[object_id]
AND indexstats.index_id = dbindexes.index_id
WHERE indexstats.database_id = DB_ID()
and indexstats.page_count > 1000
and indexstats.avg_fragmentation_in_percent > 30

Thanks in advance for you help.