Löschen eines Indexes in einer MSSQL Datenabnk ist nicht mehr möglich

USE xxx;
GO

EXEC sp_updatestats;

GO

DECLARE @DBID int
SELECT @DBID = DB_ID() 
DBCC FLUSHPROCINDB (@DBID)




USE xxx;
GO

truncate table  DBADMIN.DBO.indexreorg;
truncate table DBADMIN.DBO.index_reorg_cmd;
 



 insert into DBADMIN.DBO.indexreorg select
        OBJECT_NAME(ps.object_id) AS Tab,
        i.name AS Idx,
       ps.avg_fragmentation_in_percent AS Required 
    FROM sys.dm_db_index_physical_stats(DB_ID(), NULL, NULL, NULL, 'limited') AS ps   
    INNER JOIN sys.indexes AS i ON i.index_id = ps.index_id AND i.object_id = ps.object_id
    WHERE  (OBJECTPROPERTY(i.object_id, 'IsUserTable') = 1);  

insert into DBADMIN.DBO.index_reorg_cmd SELECT 'alter index ' + QUOTENAME(Idx) + ' on ' + 'xxx.DBO.' + QUOTENAME(Tab) + ' ' + ' REORGANIZE '  as befehl  
FROM DBADMIN.DBO.IndexReorg 
WHERE Required > 5 and Required < 31 AND (Tab LIKE 'T_%');  


insert into DBADMIN.DBO.index_reorg_cmd 
select 'alter index ' + QUOTENAME(Idx) + ' on ' + 'xxx.DBO.' + QUOTENAME(Tab) + ' ' + ' REBUILD '   
from DBADMIN.DBO.IndexReorg where Required > 30 AND (Tab LIKE 'T_%');   

DECLARE @cmd nvarchar(max);
DECLARE index_remake CURSOR FOR
select * from DBADMIN.DBO.index_reorg_cmd
OPEN index_remake
fetch next from index_remake into @cmd;

while @@FETCH_STATUS = 0

	begin
	print @cmd;
	exec(@cmd);
	SET @cmd = '';  
	fetch next from index_remake into @cmd;
	end
	

close index_remake;
deallocate index_remake;