This question already has an answer here:
I just edited a typo in this question of mine which was rightfully closed as a duplicate. When I did, I saw that I could edit the automatically inserted text, possibly removing it. I didn't try to do so, but, should I be allowed to edit that text?
I'm going to post another question to test this.
EDIT: Yes, I was able to delete the automatically added text which linked my duplicate question to the "real" question... isn't that... not good? I guess you'd have to be pretty stupid to delete that text from your own question, but...