Scheduling agreement - how to un archive

By mistake, I ran t-code MEMASSSA choosing the field EKKO_LOEKZ for Scheduling Agreement inserting "L", as hence all documents has been archived. Is it possible to un archived? I attempted to re-run the same transaction inserting empty in that field, but unsuccessful. Any thoughts?

I am aware of it to delete massively, SA the correct field is EKPO_LOEKZ.