Delete Archived Document Flow (VA13)

Hello, everybody!

I created customer inquiry "1111111" with refrence inquiry "2222222".

Now i want to delete refrence inquiry "2222222" and document flow.

I have been deleted inquiry "2222222" and flow.

But document flow of "1111111" always displayed refrence "2222222" as archived status.

how to delete archived.

Please help me!

Thanks regards!