SySmain ReName Unix: Error 4859, more clearer explanation?

I am trying to rename objects from one lib to another, and changing the object name, I am experiencing error 4859 even though lines of code have changed. Error message says: “New rename data must be different”. Can someone expand upon that explanation for me please?
What did I miss? :?
thanks in advance.

I found out that the msg means the name I was trying to rename the object to already existed. Hmm, maybe the error msg could read "The object name already exists’… oh well:P