Help with Date conditions

Hi, I have this rule to send an email every time a new file is added to a folder:
http://snpy.in/EfhbCk

It works fine, but if I rename a file that was in that folder before, the rule runs and send an email again. How can I avoid that happens?
http://snpy.in/EfhbCk
It works fine, but if I rename a file that was in that folder before, the rule runs and send an email again. How can I avoid that happens?