Unable to delete request from DSO

Hi,

I have deleted requests from Infocube and when i try to delete the same request from ODS, it shows like No QM status is avialble. Actually, I even tried to find entries from RSODSACTREQ, RSICCONT, RSTSODS, RSREQICODS

etc in production ECC system. But none of the tables shows any entries.

What else ways to delete from DSO?

Thanks iN advance,

Suman