Canceling an in-progress mission and starting from the beginning Map Pilot Pro

Thanks for taking a look.

I started a mission but I forgot to take a filter off the camera from the last time I flew. The app slowed the flight down because of "low light levels". So what was an easy 8 minute flight suddenly got way longer. 

I did a RTH and removed the filter. But I couldn't see a way the wipe the progress from the "filter flight" and start over. And when I sent the drone back it kept the same slower speed. 

Is there a way to "cancel a mission" mid-way and begin again. I the past I just re-created a new mission but I'd really like to keep the one I'm using.

Thanks again.