Redirect link “amp”

Hi guys. I am using your plugin because I wanted to change the Permalink type from:
/%year%/%monthnum%/y%/%postname%/
to
/%postname%/
I found your plugin really great, I thought I was going crazy to perform the modification of all the links, but through your Permalink Migration option, it took me a second to set everything up.
Now I was seeing that in google some pages like:
/%year%/%monthnum%/y%/%postname%/amp/
but the plugin does not redirect to
/%postname%/amp/

I tried to set up a regex rule with the following data:
Starting URL: ^/%year%/%monthnum%/y%/%postname%/amp/
Destination URL: /%postname%/amp/

But it still doesn’t work, am I wrong something?
Waiting for your reply, Best Regards.