Remove xmltv mapping?

I mapped a channel to another guide source. How do I remove that mapping? When i click on the edit pencil icon it stays on the same mapping. I don't want to change it - I want to remove it.

How did you do that (not sure what you mean)

In Edit Channel Lineup there is an Edit button on the channel which lets you map the channel to another EPG channel/source. I want to undo that change so that the channel has no EPG info (rather than wrong EPG info). There doesn't seem to be a way to do that.

Screenshot 2026-06-13 075918
Screenshot 2026-06-13 080009
Screenshot 2026-06-13 080055
selecting X-M3U will use the info from the m3u. if you have a tvc-guide-stationid set in the m3u, remove/repace with tvc-guide-stationid=""

sorry, reread and better understand slightly
did you make this initial change? if you could make a change to the entire source, then change back to the correct using the dropdown i screenshotted

or again, just map the stationid's the way you want in the m3u