WP has changed the filepath of my URLs

Hi,

WP has changed the filepath of my URLs. For example, what used to be:

https://www.cairnsaustraliatravelguide.com/cairns-scuba-diving

is now:

https://www.cairnsaustraliatravelguide.com/cairns-great-barrier-reef-2/cairns-scuba-diving

The problem with this is that Google has already indexed my site and listed my web pages: when someone clicks on those listings they are going to receive a “Page Not Found” error message.

Is it possible for me to remove this part of the URL or permalink:

/cairns-great-barrier-reef-2/

I’d be very grateful if anyone can suggest a sollution or point me in the right direction.

Thanks!

Michael.