Wrong poster in On Now and Recordings library

Most of the poster art for recorded TV (I'm recording OTA tv from my HDHomeRun) is correct, however there are a couple of shows where it's wrong.

One such example is a local news program called Sunday, I can see that it's picking up the poster image from TheTVDB.com website. The correct Sunday poster is also on that website - is there a way I can select the correct poster?

Thanks!

The art comes from our guide provider.

You can change it by clicking Update Art on the web UI

Thank you! I looked for a "Fix Match" option yesterday, but I totally missed the "Update Art" - this looks like exactly what I need! Much appreciated.