JD Birkenfeld

I am building a house for a customer. I built this wall, then made a copy of it before linking the original to the rest of the house. I tried to pic up the copy, it does put the copy in my inventory but the original (copy) stays on the ground. I have tried to take it, delete it & derender it but nothing works. it's 42 prims that I don't need laying around Someone please help me get rid of this ghost wall.